1 7(2x-1)-3(4x-1)=4(3x+2)-1;

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

3 0.4(x-0.2)+1.5=0.7x-0.38 x=6

4 30x-10(10-x)=100 x=5

5 4(x+2)=5(x-2) x=18

6 120-4(x+5)=25 x=18.75

7 15x+863-65x=54 x=16.18

8 3(x-2)+1=x-(2x-1) x=3/2

9 11x+64-2x=100-9x x=2

10 (5y+1)+ (1-y)= (9y+1)+ (1-3y);

11 20%+(1-20%)(320-x)=320×40%

12 2(x-2)-3(4x-1)=9(1-x)

13 15-(8-5x)=7x+(4-3x)

14 32-x=2

15 2 0.52x-(1-0.52)x=80

16 3x+7=32-2x

17 3x-7(x-1)=3-2(x+3)

18 3(20-y)=6y-4(y-11)

19 2x－5x＋1＝0 X= 1/3

20 （2x－3）－2（2x－3）－3＝0 X=0