66x+17y=3967 25x+y=1200 答案:x=48 y=47 (2) 18x+23y=2303 74x-y=1998 答案:x=27 y=79 (3) 44x+90y=7796 44x+y=3476 答案:x=79 y=48 (4) 76x-66y=4082 30x-y=2940 答案:x=98 y=51 (5) 67x+54y=8546 71x-y=5680 答案:x=80 y=59 (6) 42x-95y=-1410 21x-y=1575 答案:x=75 y=48 (7) 47x-40y=853 34x-y=2006 答案:x=59 y=48 (8) 19x-32y=-1786 75x+y=4950 答案:x=66 y=95 (9) 97x+24y=7202 58x-y=2900 答案:x=50 y=98 (10) 42x+85y=6362 63x-y=1638 答案:x=26 y=62 (11) 85x-92y=-2518 27x-y=486 答案:x=18 y=44 (12) 79x+40y=2419 56x-y=1176 答案:x=21 y=19 (13) 80x-87y=2156 22x-y=880 答案:x=40 y=12 (14) 32x+62y=5134 57x+y=2850 答案:x=50 y=57 (15) 83x-49y=82 59x+y=2183 答案:x=37 y=61 (16) 91x+70y=5845 95x-y=4275 答案:x=45 y=25 (17) 29x+44y=5281 88x-y=3608 答案:x=41 y=93 (18) 25x-95y=-4355 40x-y=2000 答案:x=50 y=59 (19) 54x+68y=3284 78x+y=1404 答案:x=18 y=34 (20) 70x+13y=3520 52x+y=2132 答案:x=41 y=50 (21) 48x-54y=-3186 24x+y=1080 答案:x=45 y=99 (22) 36x+77y=7619 47x-y=799 答案:x=17 y=91 (23) 13x-42y=-2717 31x-y=1333 答案:x=43 y=78 (24) 28x+28y=3332 52x-y=4628 答案:x=89 y=30 (25) 62x-98y=-2564 46x-y=2024 答案:x=44 y=54 (26) 79x-76y=-4388 26x-y=832 答案:x=32 y=91 (27) 63x-40y=-821 42x-y=546 答案:x=13 y=41 (28) 69x-96y=-1209 42x+y=3822 答案:x=91 y=78 (29) 85x+67y=7338 11x+y=308 答案:x=28 y=74 (30) 78x+74y=12928 14x+y=1218 答案:x=87 y=831、一元一次不等式:数学名词,用不等号连接,含有个一个未知数,并且含有未知数项的次数都是1的,系数不为0的,左右两边为整式的式子叫做一元一次不等式。2、概念定义一般用符号“=”连接的式子叫做等式。注意:等式的左右两边是代数式。一般地,用符号“”(或“≥”),“≠”连接的式子叫做不等式。3、用不等号连接的,含有一个未知数,并且未知数项的次数都是1,系数不为0,左右两边为整式的式子叫做一元一次不等式。4、等式性质:(1)等式的两边都加上(或减去)同一个数(或式子),不等号的方向不变。(2)等式的两边都乘以(或除以)同一个正数,不等号的方向不变。(3)等式的两边都乘以(或除以)同一个负数,不等号的方向改变。

本回答被网友采纳

66x+17y=3967 25x+y=1200 答案:x=48 y=47 (2) 18x+23y=2303 74x-y=1998 答案:x=27 y=79 (3) 44x+90y=7796 44x+y=3476 答案:x=79 y=48 (4) 76x-66y=4082 30x-y=2940 答案:x=98 y=51 (5) 67x+54y=8546 71x-y=5680 答案:x=80 y=59 (6) 42x-95y=-1410 21x-y=1575 答案:x=75 y=48 (7) 47x-40y=853 34x-y=2006 答案:x=59 y=48 (8) 19x-32y=-1786 75x+y=4950 答案:x=66 y=95 (9) 97x+24y=7202 58x-y=2900 答案:x=50 y=98 (10) 42x+85y=6362 63x-y=1638 答案:x=26 y=62 (11) 85x-92y=-2518 27x-y=486 答案:x=18 y=44 (12) 79x+40y=2419 56x-y=1176 答案:x=21 y=19 (13) 80x-87y=2156 22x-y=880 答案:x=40 y=12 (14) 32x+62y=5134 57x+y=2850 答案:x=50 y=57 (15) 83x-49y=82 59x+y=2183 答案:x=37 y=61 (16) 91x+70y=5845 95x-y=4275 答案:x=45 y=25 (17) 29x+44y=5281 88x-y=3608 答案:x=41 y=93 (18) 25x-95y=-4355 40x-y=2000 答案:x=50 y=59 (19) 54x+68y=3284 78x+y=1404 答案:x=18 y=34 (20) 70x+13y=3520 52x+y=2132 答案:x=41 y=50 (21) 48x-54y=-3186 24x+y=1080 答案:x=45 y=99 (22) 36x+77y=7619 47x-y=799 答案:x=17 y=91 (23) 13x-42y=-2717 31x-y=1333 答案:x=43 y=78 (24) 28x+28y=3332 52x-y=4628 答案:x=89 y=30 (25) 62x-98y=-2564 46x-y=2024 答案:x=44 y=54 (26) 79x-76y=-4388 26x-y=832 答案:x=32 y=91 (27) 63x-40y=-821 42x-y=546 答案:x=13 y=41 (28) 69x-96y=-1209 42x+y=3822 答案:x=91 y=78 (29) 85x+67y=7338 11x+y=308 答案:x=28 y=74 (30) 78x+74y=12928 14x+y=1218 答案:x=87 y=83 (31) 39x+42y=5331 59x-y=5841 答案:x=99 y=35 (32) 29x+18y=1916 58x+y=2320 答案:x=40 y=42 (33) 40x+31y=6043 45x-y=3555 答案:x=79 y=93 (34) 47x+50y=8598 45x+y=3780 答案:x=84 y=93 (35) 45x-30y=-1455 29x-y=725 答案:x=25 y=86 (36) 11x-43y=-1361 47x+y=799 答案:x=17 y=36 (37) 33x+59y=3254 94x+y=1034 答案:x=11 y=49 (38) 89x-74y=-2735 68x+y=1020 答案:x=15 y=55 (39) 94x+71y=7517 78x+y=3822 答案:x=49 y=41 (40) 28x-62y=-4934 46x+y=552 答案:x=12 y=85 (41) 75x+43y=8472 17x-y=1394 答案:x=82 y=54 (42) 41x-38y=-1180 29x+y=1450 答案:x=50 y=85 (43) 22x-59y=824 63x+y=4725 答案:x=75 y=14 (44) 95x-56y=-401 90x+y=1530 答案:x=17 y=36 (45) 93x-52y=-852 29x+y=464 答案:x=16 y=45 (46) 93x+12y=8823 54x+y=4914 答案:x=91 y=30 (47) 21x-63y=84 20x+y=1880 答案:x=94 y=30 (48) 48x+93y=9756 38x-y=950 答案:x=25 y=92 (49) 99x-67y=4011 75x-y=5475 答案:x=73 y=48 (50) 83x+64y=9291 90x-y=3690 答案:x=41 y=92希望对你能有所帮助。 追问 我要的是不等式组计算题 本回答被网友采纳

给吧,我给你答案 追问 我要题和答案

题在哪儿啊亲?! 更多追问追答 追问 我要题和答案 追答 你上百度知道搜“一元一次不等式题集”答案题目都齐了···1) 3-(a-5)>3a-4 (a1又3分之1)3)3-4[1-3(2-x)] 大于等于 59 (x小于等于-3)4)6(1-3分之1x)大于等于 2+5分之1(10——15x) (x大于等于-2)5)6分之7x-13>3分之3x-8 (x>-3)6)4x-10-4)7) x-2-2分之2-x>3分之x-2 (x>2)8) x-6分之2-x-3分之4x-3 大于等于0 (x小于等于4)9)3分之x-2分之x-13(4x+2)11)1-2分之1x>212)7x-2(x-3)2-x(x-1)17)x-2(x+2分之1)小于等于1-3(1-x)18)3(x-1)+2(1-3x)<519)3分之1x-1<x-3分之120)6(1-3分之2x)<2+5分之1(10-15x) 追问 我要不等式组! 追答 百度文库有很多·········直接搜“一元一次不等式组练习题(含答案)”就可以了·····

1. 3X+1<3(X+19)+1 2X+7≥2(X+14)+92. 6X+6<7(X+2)+1 2X-11<6(X-5)-13. 7X-10<4(X-13)-3 5X-3≤5(X-2)-94. 6X+9>1(X+5)+2 3X-7>6(X-13)-45. 6X-1<7(X-11)-1 3X-19>5(X-19)-46. 5X-19>6(X-13)-6 2X-5>6(X-16)-67. 5X-18<1(X-14)-2 5X+4≤4(X+17)+68. 3X-13≤2(X-16)-5 3X+18<5(X+19)+19. 2X+6<1(X+7)+5 6X+12<1(X+10)+510. 5X-1<4(X-20)-7 4X+14≤4(X+9)+211. 5X+18≤1(X+6)+6 2X-3≤1(X-9)-612. 7X+7<1(X+7)+4 2X-1>5(X-19)-113. 7X-16<3(X-2)-3 4X-2<3(X-5)-214. 6X-5<7(X-3)-7 2X-18≥2(X-20)-315. 6X-10≤6(X-7)-9 2X-16≤6(X-10)-816. 7X-19≥6(X-7)-9 1X+5≤2(X+11)+317. 5X+14≥6(X+13)+5 7X-8≥3(X-3)-418. 5X+19<6(X+14)+2 5X-4≥2(X-18)-519. 3X+15<4(X+12)+8 5X+17<4(X+17)+420. 6X+7≥3(X+10)+6 2X-13≥3(X-12)-521. 4X-4≥1(X-8)-2 7X-10≥1(X-11)-222. 3X+16<3(X+4)+6 6X+9≥5(X+2)+323. 7X+20≥4(X+18)+10 7X-13<2(X-15)-224. 7X+5<4(X+19)+6 7X+17≤3(X+7)+325. 1X-15<4(X-14)-2 4X-8≥6(X-12)-926. 5X-7≥7(X-2)-3 6X+8≤7(X+7)+927. 4X+19≥2(X+18)+7 4X-12<1(X-17)-728. 4X-10<1(X-7)-1 3X+12>5(X+11)+329. 6X-18≤4(X-16)-10 3X-11>6(X-14)-730. 3X+9≥7(X+1)+5 3X-2<6(X-20)-631. 5X-15>4(X-18)-1 2X-8<6(X-16)-832. 2X-6≤7(X-3)-7 2X+7<1(X+19)+233. 2X-5≤2(X-6)-10 4X-7>1(X-11)-634. 4X-13<4(X-16)-7 4X-13<5(X-8)-735. 4X-12<6(X-18)-1 2X+1<4(X+17)+1036. 6X+6<4(X+20)+10 2X+7≤1(X+13)+437. 4X-3>4(X-6)-8 7X+3≥1(X+19)+138. 6X+18≤2(X+11)+2 2X+18>6(X+4)+539. 2X-16≥7(X-11)-4 1X+5≥3(X+1)+640. 7X-19≤4(X-10)-1 3X-19<1(X-3)-541. 6X-5<1(X-7)-2 5X+14<3(X+16)+642. 6X+18≤1(X+8)+6 7X-14<5(X-1)-943. 7X-20≤1(X-7)-10 6X+1≥1(X+20)+744. 2X+2≤5(X+14)+8 7X+11≤4(X+13)+845. 3X+4>6(X+11)+4 2X-12≤1(X-1)-646. 2X-6≥7(X-18)-9 1X+6≥7(X+12)+647. 6X+14<7(X+20)+2 5X+15<1(X+13)+1048. 5X+8≤6(X+13)+8 4X+16>2(X+20)+449. 7X+10≤3(X+1)+6 1X-6≥7(X-14)-950. 1X+7<1(X+9)+4 7X+15<4(X+18)+851. 3X+7≥7(X+4)+1 3X-11<6(X-14)-952. 7X-4<1(X-13)-3 6X-13<3(X-2)-753. 5X-13<4(X-14)-7 4X+2<7(X+4)+954. 2X-3>3(X-8)-1 1X-19>1(X-13)-1055. 3X+20≥5(X+5)+4 2X+14≤4(X+17)+256. 7X+3≥2(X+16)+1 5X+19≤7(X+1)+1057. 1X+20>4(X+14)+4 7X+8>7(X+4)+658. 3X+9≥4(X+17)+9 4X+5≤1(X+13)+759. 6X+1≥2(X+15)+5 4X-16≤2(X-8)-360. 7X+4≥1(X+15)+3 1X+20≤5(X+12)+161. 3X-9≥4(X-19)-2 1X-4≥2(X-4)-162. 4X-5>6(X-17)-4 3X-1>4(X-2)-363. 3X-4≤4(X-20)-7 2X+12≤7(X+9)+264. 4X-8≥1(X-13)-7 3X+4≤6(X+16)+865. 5X-19≥1(X-20)-3 2X-3≤3(X-9)-766. 4X-19<5(X-14)-10 2X+2≤5(X+11)+1067. 4X+9<5(X+9)+5 1X+1≤3(X+13)+668. 3X-9<2(X-2)-4 2X-5≥7(X-5)-569. 4X+1>2(X+9)+1 6X-17≤3(X-15)-370. 2X-20>6(X-4)-7 7X+6≥7(X+17)+371. 5X+10≤7(X+17)+9 3X+5>5(X+20)+1072. 7X+9<1(X+11)+1 2X+13<4(X+8)+673. 4X+9≤5(X+14)+9 2X-12<6(X-11)-1074. 7X-14≤7(X-18)-5 7X+5≥2(X+2)+975. 5X+1≤6(X+7)+8 3X+4>6(X+7)+476. 5X-20≤1(X-9)-2 2X-12>5(X-16)-777. 3X+14>3(X+2)+9 5X+4<2(X+15)+1078. 3X+8≥2(X+15)+6 1X-11>3(X-13)-579. 5X+15>5(X+3)+6 6X-18≤1(X-4)-680. 4X-8≥5(X-6)-8 2X+11≤5(X+4)+681. 6X+2<7(X+19)+9 6X+13≥2(X+2)+682. 4X-4>4(X-16)-9 6X+8≤1(X+17)+983. 7X+18≤6(X+9)+10 3X-16<1(X-18)-284. 1X-19≤1(X-18)-8 5X-10≥3(X-9)-685. 4X-13≤3(X-9)-2 2X-17<3(X-7)-186. 1X-16<7(X-8)-9 2X+13<2(X+6)+287. 6X+4>4(X+1)+5 1X+14>3(X+13)+788. 4X-6≥1(X-18)-5 5X+17<6(X+14)+289. 7X+20<3(X+11)+7 4X+4<4(X+3)+390. 5X+15<3(X+19)+10 1X-14>3(X-17)-791. 5X-5≥5(X-12)-10 6X-16≥4(X-7)-792. 1X-6≥4(X-9)-5 3X-12≥6(X-2)-1093. 7X+10<4(X+12)+10 1X-1>2(X-7)-794. 6X+12≥4(X+2)+10 7X+3≤3(X+14)+195. 5X+7≥1(X+13)+1 5X-5≤1(X-4)-596. 3X+16<4(X+19)+9 3X-2≤7(X-1)-497. 1X-13<2(X-15)-7 3X-18>6(X-19)-698. 7X-4≤5(X-4)-3 1X-2<6(X-11)-299. 5X+13≤1(X+6)+5 1X+19<3(X+2)+5100. 5X+16<2(X+19)+4 6X-2≤6(X-1)-91. 1X-8<7(X-12)-5 5X+6>4(X+20)+82. 4X-13<3(X-14)-6 1X+18<3(X+17)+63. 5X+17<1(X+5)+8 2X-2<7(X-8)-84. 4X-16<5(X-17)-9 1X-14>2(X-5)-15. 5X-8<4(X-2)-8 2X+6<2(X+10)+16. 2X-19≤7(X-9)-1 7X+13<1(X+18)+67. 4X+19<1(X+1)+6 1X-4<1(X-4)-58. 7X+11≥5(X+1)+6 2X-5<2(X-11)-59. 1X-13≥5(X-18)-2 5X-12<3(X-6)-510. 4X+20≥5(X+14)+9 1X+6≥5(X+17)+811. 1X-10>4(X-9)-3 5X-15>4(X-11)-312. 7X+19>1(X+9)+7 4X+17≤5(X+17)+1013. 2X+20<5(X+15)+8 4X-14>2(X-7)-514. 2X+17≥3(X+5)+3 6X+3≥2(X+8)+315. 7X+6≥6(X+5)+8 6X+20>7(X+14)+316. 7X-4≤3(X-15)-3 4X-17>5(X-13)-917. 5X-20>2(X-10)-4 2X-6>2(X-13)-318. 5X-11≤5(X-17)-2 1X+17≤5(X+20)+219. 3X-7>4(X-12)-3 6X+13>4(X+15)+320. 2X-12≥3(X-17)-5 6X-5≤5(X-15)-221. 7X-8≤2(X-12)-7 3X-2>4(X-10)-322. 4X+20>5(X+20)+7 6X+14>2(X+9)+923. 4X-5≤5(X-2)-4 4X+18<3(X+2)+224. 4X+16≤4(X+9)+1 3X+17<7(X+13)+325. 3X+15≥3(X+11)+6 3X-8<1(X-10)-626. 4X+6≤2(X+17)+5 7X+19>4(X+15)+127. 3X+18<4(X+16)+4 3X+11>2(X+13)+728. 4X-10<3(X-4)-1 7X+3≥5(X+1)+729. 1X+1≤6(X+9)+6 2X+3>6(X+14)+230. 3X+1>6(X+4)+6 6X+14<1(X+2)+331. 7X-12≤3(X-9)-1 1X-20>6(X-18)-132. 2X+6≥2(X+20)+7 1X-19<7(X-18)-733. 2X+5≥3(X+4)+8 5X+18≤5(X+1)+534. 3X+12<6(X+12)+7 7X+5≥1(X+10)+435. 7X-11>4(X-12)-10 6X-12≤5(X-6)-736. 1X+6≤2(X+17)+4 1X-7≤3(X-9)-437. 7X+15<7(X+8)+5 6X+3<3(X+16)+938. 7X-9≤6(X-19)-5 1X-18>1(X-20)-539. 1X+3≥4(X+2)+1 7X-4≥5(X-16)-840. 1X+10≤1(X+1)+9 1X-6≥5(X-14)-241. 5X+12<4(X+20)+7 1X+13≤1(X+13)+1042. 5X-18≥2(X-4)-6 1X-18>7(X-17)-1043. 6X-7>5(X-16)-9 5X+8≤5(X+11)+444. 5X-1≥4(X-8)-7 4X+2<4(X+2)+445. 7X+15≥6(X+1)+9 1X-12>3(X-16)-946. 1X-5≥1(X-16)-7 7X-6≥2(X-8)-647. 7X-18>2(X-15)-3 1X-14≥6(X-10)-448. 4X+15≤3(X+4)+5 3X-3>5(X-13)-949. 3X+9≥2(X+15)+5 5X-5>3(X-1)-850. 7X-6<3(X-4)-6 6X-15<5(X-14)-851. 1X-3≤4(X-1)-9 7X+10≤2(X+19)+1052. 5X-19≤7(X-18)-9 4X-7≤2(X-8)-153. 7X-8>7(X-20)-5 6X-16>2(X-10)-754. 5X+17>3(X+2)+6 6X-13≥7(X-17)-755. 2X-14≤4(X-11)-8 1X-2≤7(X-20)-256. 4X+2<5(X+1)+2 4X+13>6(X+6)+757. 6X+14≥3(X+20)+8 5X+2≥6(X+8)+258. 1X+11>5(X+18)+10 7X+19>1(X+6)+559. 4X-8≤6(X-7)-2 3X-4>4(X-10)-360. 6X-11≥5(X-6)-10 4X-7≤3(X-10)-261. 6X+15<2(X+19)+10 7X+11≤6(X+14)+1062. 6X+7>4(X+19)+9 5X-16≤6(X-8)-163. 7X+4≥6(X+16)+2 1X+6>6(X+15)+664. 3X-15≤5(X-2)-6 1X-18>5(X-2)-265. 3X+6≤5(X+10)+3 5X-2<6(X-15)-666. 3X+19<6(X+11)+10 1X+14≥4(X+14)+167. 3X+9<7(X+5)+5 2X-5≥5(X-9)-768. 2X-9>4(X-20)-2 1X+4≥2(X+2)+569. 3X+20>3(X+7)+8 4X+4>7(X+5)+370. 6X-19≥1(X-9)-8 6X-11≥3(X-13)-271. 7X+9≥5(X+11)+8 2X-12<2(X-12)-772. 4X-8>3(X-14)-5 7X-20<1(X-1)-173. 2X+16≤2(X+5)+6 7X+19<2(X+3)+474. 6X-13≥2(X-16)-2 4X+16>2(X+12)+375. 4X-8≤3(X-18)-5 2X+11<3(X+16)+376. 7X+15≥3(X+16)+10 5X+18>3(X+16)+677. 7X-14≤5(X-18)-3 4X+16≤2(X+18)+178. 6X-20≤5(X-17)-3 7X-10>4(X-9)-579. 1X+14≤1(X+10)+5 5X-5>6(X-13)-580. 6X-9>2(X-12)-7 1X+11≤7(X+20)+681. 3X+14≤4(X+18)+1 4X-17≥7(X-18)-182. 4X-16≥3(X-19)-10 2X+19>4(X+16)+1083. 6X+10≥6(X+10)+3 1X-20≤6(X-13)-984. 4X-11>4(X-17)-10 5X-2>2(X-12)-785. 3X-13≥5(X-7)-10 1X+16<5(X+4)+186. 4X+2>5(X+8)+8 1X-12<4(X-2)-287. 6X-3≤6(X-17)-5 3X+14≥1(X+10)+188. 7X-12<5(X-20)-1 3X+11≤6(X+18)+889. 1X-2<1(X-13)-1 2X-12<1(X-16)-790. 3X-2≥7(X-10)-7 4X-13≤6(X-2)-891. 4X-20≤4(X-18)-4 5X+11≤3(X+13)+192. 2X+20<6(X+15)+3 3X+18≤7(X+3)+293. 4X+9≤6(X+18)+9 7X-15≥1(X-12)-394. 4X+14<6(X+1)+3 5X+5<4(X+17)+1095. 1X+13<5(X+15)+7 4X-12>6(X-13)-596. 7X-5>7(X-13)-9 4X-19<2(X-12)-397. 1X+17≤6(X+2)+3 2X+14>2(X+20)+698. 1X+13>5(X+20)+5 2X+11≥6(X+8)+499. 5X+17<6(X+12)+1 6X+16≥7(X+3)+5100. 5X-8>2(X-1)-7 6X-6<3(X-8)-5

1、2X+3>0 -3X+5>0 2、2X<-1 X+2>0 3、5X+6<3X 8-7X>4-5X 4、2(1+X)>3(X-7) 4(2X-3)>5(X+2) 5、2X<4 X+3>0 6、1-X>0 X+2<0 7、5+2X>3 X+2<8 8、2X+4<0 1/2(X+8)-2>0 9、5X-2≥3(X+1) 1/2X+1>3/2X-3 10、1+1/2X>2 2(X-3)≤4x+3>-1 4x>-12 3(2x+5)>2(4x+3) 10_4(x-4)<2(X-1) 5x+1/6-2>x-5/4 2x+5<10 本回答被网友采纳

对不起我没有

我去我去我去

66x+17y=3967 25x+y=1200 答案:x=48 y=47 (2) 18x+23y=2303 74x-y=1998 答案:x=27 y=79 (3) 44x+90y=7796 44x+y=3476 答案:x=79 y=48 (4) 76x-66y=4082 30x-y=2940 答案:x=98 y=51 (5) 67x+54y=8546 71x-y=5680 答案:x=80 y=59 (6) 42x-95y=-1410 21x-y=1575 答案:x=75 y=48 (7) 47x-40y=853 34x-y=2006 答案:x=59 y=48 (8) 19x-32y=-1786 75x+y=4950 答案:x=66 y=95 (9) 97x+24y=7202 58x-y=2900 答案:x=50 y=98 (10) 42x+85y=6362 63x-y=1638 答案:x=26 y=62 (11) 85x-92y=-2518 27x-y=486 答案:x=18 y=44 (12) 79x+40y=2419 56x-y=1176 答案:x=21 y=19 (13) 80x-87y=2156 22x-y=880 答案:x=40 y=12 (14) 32x+62y=5134 57x+y=2850 答案:x=50 y=57 (15) 83x-49y=82 59x+y=2183 答案:x=37 y=61 (16) 91x+70y=5845 95x-y=4275 答案:x=45 y=25 (17) 29x+44y=5281 88x-y=3608 答案:x=41 y=93 (18) 25x-95y=-4355 40x-y=2000 答案:x=50 y=59 (19) 54x+68y=3284 78x+y=1404 答案:x=18 y=34 (20) 70x+13y=3520 52x+y=2132 答案:x=41 y=50 (21) 48x-54y=-3186 24x+y=1080 答案:x=45 y=99 (22) 36x+77y=7619 47x-y=799 答案:x=17 y=91 (23) 13x-42y=-2717 31x-y=1333 答案:x=43 y=78 (24) 28x+28y=3332 52x-y=4628 答案:x=89 y=30 (25) 62x-98y=-2564 46x-y=2024 答案:x=44 y=54 (26) 79x-76y=-4388 26x-y=832 答案:x=32 y=91 (27) 63x-40y=-821 42x-y=546 答案:x=13 y=41 (28) 69x-96y=-1209 42x+y=3822 答案:x=91 y=78 (29) 85x+67y=7338 11x+y=308 答案:x=28 y=74 (30) 78x+74y=12928 14x+y=1218 答案:x=87 y=831、一元一次不等式:数学名词,用不等号连接,含有个一个未知数,并且含有未知数项的次数都是1的,系数不为0的,左右两边为整式的式子叫做一元一次不等式。2、概念定义一般用符号“=”连接的式子叫做等式。注意:等式的左右两边是代数式。一般地,用符号“”(或“≥”),“≠”连接的式子叫做不等式。3、用不等号连接的,含有一个未知数,并且未知数项的次数都是1,系数不为0,左右两边为整式的式子叫做一元一次不等式。4、等式性质:(1)等式的两边都加上(或减去)同一个数(或式子),不等号的方向不变。(2)等式的两边都乘以(或除以)同一个正数,不等号的方向不变。(3)等式的两边都乘以(或除以)同一个负数,不等号的方向改变。

1.下列不等式中,是一元一次不等式的有[ ]A.3x(x+5)>3x2+7;B.x2≥0;C.xy-2<3;D.x+y>5.2.不等式6x+8>3x+8的解是[ ]3.3x-7≥4x-4的解是[ ]A.x≥3;B.x≤3;C.x≥-3;D.x≤-3.4.若|m-5|=5-m,则m的取值范围是[ ]A.m>5;B.m≥5;C.m<5;D.m≤5.[ ]A.x>15;B.x≥15;C.x<15;D.x≤15.6.若关于x的方程3x+3k=2的解是正数,则k的值为[ ]C.k为任何实数;D.以上答案都不对.7.下列说法正确的是[ ]A.x=2是不等式3x>5的一个解;B.x=2是不等式3x>5的解;C.x=2是不等式3x>5的唯一解;D.x=2不是不等式3x>5的解.[ ]A.y>0;B.y<0;C.y=0;D.以上都不对.9.下列说法错误的是[ ]D.x<3的正数解有有限个.[ ]A.x≤4;B.x≥4;[ ]A.x<-2;B.x>-2;D.x<2;D.x>2,[ ]A.大于2的整数;B.不小于2的整数;D.2;D.x≥3.[ ]A.无数个;B.0和1;C.1;D.以上都不对.[ ]A.x>1;B.x≤1;C.x≥1;D.x<1.[ ]A.2x-3x-3<6,-x<9,x>-9;B.2x-3x+3<6,-x<3,x>-3;C.2x-3x+1<6,-x<5,x<-5;D.2x-3x+3<1,-x<-2,x<2.(二)解一元一次不等式16.2x-19<7x+31.26.3x-2(9-x)>3(7+2x)-(11-6x).27.2(3x-1)-3(4x+5)≤x-4(x-7).28.2(x-1)-x>3(x-1)-3x-5.29.3[y-2(y-7)]≤4y.31.15-(7+5x)≤2x+(5-3x).

没看懂提问。。。

别人给你的,也是百度出来的,为什么自己不先百度一下? 不等式组 1、2X+3>0 -3X+5>0 2、2X<-1 X+2>0 3、5X+6<3X 8-7X>4-5X 4、2(1+X)>3(X-7) 4(2X-3)>5(X+2) 5、2X<4 X+3>0 6、1-X>0 X+2<0 7、5+2X>3 X+2<8 8、2X+4<0 1/2(X+8)-2>0 9、5X-2≥3(X+1) 1/2X+1>3/2X-3 10、1+1/2X>2 2(X-3)≤4x+3>-1 4x>-12 3(2x+5)>2(4x+3) 10_4(x-4)<2(X-1) 5x+1/6-2>x-5/4 2x+5<10

共40个1.2x+9y<81 3x+y>=34 2.9x+4y<35 8x+3y<=30 3.7x+2y<52 7x+4y>=62 4.4x+6y<54 9x+2y>87 5.2x+y<7 2x+5y>=19 6.x+2y<21 3x+5y>56 7.5x+7y<52 5x+2y>22 8.5x+5y<65 7x+7y>203 9.8x+4y<56 x+4y>21 10.5x+7y<41 5x+8y>44 11.7x+5y<54 3x+4y>38 12.x+8y<15 4x+y>29 13.3x+6y<24 9x+5y>46 14.9x+2y<62 4x+3y>36 15.9x+4y<46 7x+4y=42 16.9x+7y<135 4x+y>41 17.3x+8y<51 x+6y>27 18.9x+3y<99 4x+7y>95 19.9x+2y<38 3x+6y>18 20.5x+5y<45 7x+9y=69 21.8x+2y<28 7x+8y>62 22.x+6y<14 3x+3y>27 23.7x+4y<67 2x+8y>26 24.5x+4y<52 7x+6y>74 25.7x+y<9 4x+6y>16 26.6x+6y<48 6x+3y>42 27.8x+2y<16 7x+y>11 28.4x+9y<77 8x+6y>94 29.6x+8y<68 7x+6y>66 30.2x+2y>22 7x+2y>47 1、2X+3>0 -3X+5>0 2、2X<-1 X+2>0 3、5X+6<3X 8-7X>4-5X 4、2(1+X)>3(X-7) 4(2X-3)>5(X+2) 5、2X<4 X+3>0 6、1-X>0 X+2<0 7、5+2X>3 X+2<8 8、2X+4<0 1/2(X+8)-2>0 9、5X-2≥3(X+1) 1/2X+1>3/2X-3 10、1+1/2X>2 2(X-3)≤4

你卡时间上课阿斯