问题标题:
【一元一次方程,一小时内求解决,1.7(2x-1)-3(4x-1)=4(3x+2)-1;2.(5y+1)+(1-y)=(9y+1)+(1-3y);3.20%+(1-20%)(320-x)=320×40%4.2(x-2)+2=x+15.2(x-2)-3(4x-1)=9(1-x)6.11x+64-2x=100-9x7.15-(8-5x)=7x+(4-3x)8.3(x-7)-2[9-4(2-x)]=229.3/2[2/3(1/4x-1)-2]-】
问题描述:

一元一次方程,一小时内求解决,

1.7(2x-1)-3(4x-1)=4(3x+2)-1;

2.(5y+1)+(1-y)=(9y+1)+(1-3y);

3.20%+(1-20%)(320-x)=320×40%

4.2(x-2)+2=x+1

5.2(x-2)-3(4x-1)=9(1-x)

6.11x+64-2x=100-9x

7.15-(8-5x)=7x+(4-3x)

8.3(x-7)-2[9-4(2-x)]=22

9.3/2[2/3(1/4x-1)-2]-x=2

10.2x-10.3x=15

11.0.52x-(1-0.52)x=80

12.x/2+3x/2=7

13.3x+7=32-2x

14.3x+5(138-x)=540

15.3x-7(x-1)=3-2(x+3)

16.18x+3x-3=18-2(2x-1)

17.3(20-y)=6y-4(y-11)

18.-(x/4-1)=5

19.3[4(5y-1)-8]=6

20.10/3(x/5+3/7)=9x/2

21.5/3(x+0.5)+2=3x-6

22.5x+2(2x/3+2)=2/3(x-6)+2

23.(2x-7)/2-(6x-5)/3=2x+3

24.(3x+2)/5-(x-6)=x/3

25.6x-(x/3+2)=2(x/5+5/2)-3

26.3(x/11-2)-5=2+3x/3

27.10/3(2x-6)=3/5

28.x/2-(x/3-2)=3

29.2/3(x+3)-3=5x/3

30.5/3(2x-5/3)=2x/5-8/9

31.25(x/3-x/2+2/5)-2=3/5(x-2/7)+4/9

马缚龙回答:
  第10个有问题,看看题对吗?   18.-(x/4-1)=5   -x/4+1=5   -x/4=4   x=-16   19.3[4(5y-1)-8]=6   3(20y-4-8)=6   20y-12=2   20y=14   y=10/7   20.10/3(x/5+3/7)=9x/2   x/5+3/7=9x/2*3/10=27x/20   x/5-27x/20=-3/7   -23x/20=-3/7   x=3/7*20/23=60/161   21.5/3(x+0.5)+2=3x-6   5/3x+5/6+2=3x-6   -4x/3=-8-5/6=-53/6   x=53/8   22.5x+2(2x/3+2)=2/3(x-6)+2   5x+4x/3+4=2x/3-2   5x+2x/3=-6   17x/3=-6   x=-18/17   23.(2x-7)/2-(6x-5)/3=2x+3   x-7/2-2x+5/3=2x+3   -3x-11/6=3   -3x=29/6   x=-29/18   24.(3x+2)/5-(x-6)=x/3   (3x+2)/5-(x-6)=x/3   3(3x+2)-15(x-6)=5x   9x+6-15x+90-5x=0   -11x+96=0   -11x=-96   x=96/11   25.6x-(x/3+2)=2(x/5+5/2)-3   6x-x/3-2x/5=-2+5-3=0   x(6-1/3-2/5)=0   x=0   26.3(x/11-2)-5=2+3x/3   3x/11-6-5=2+x   3x/11-x=13   -8x/11=13   x=-143/8   27.10/3(2x-6)=3/5   10X5=3(2x-6)X3   50=18x-54   104=18x   x=52/9   28.x/2-(x/3-2)=3   x/6+2=3   x/6=1   x=6   29.2/3(x+3)-3=5x/3   2(x+3)-9=5x   2x+6-9=5x   -3x=3   x=-1   30.5/3(2x-5/3)=2x/5-8/9   75(2x-5/3)=18x-40   150x-125=18x-40   132x=85   x=85/132   31.25(x/3-x/2+2/5)-2=3/5(x-2/7)+4/9   25(2/5-x/6)=3x/5-6/35+4/9   10-25x/6=3x/5+11/35   -25x/6-3x/5=361/35   -143x/30=361/35   x=361*6/7*143   太麻烦了采纳吧!
马骊溟回答:
  应该是对的,做错也不要紧,只要不错太多
马缚龙回答:
  10.2x-10.3x=15   -8.3x=15   x=15/-8.3=-150/83
马骊溟回答:
  好的,十分感谢,悬赏我会以提问形式放出,不含之前的悬赏,到时候私信通知亲,我说到一定会做到的。
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