1 . 3- (X+6) = -5(X-1)
2. 7(2X-1)-3(4X- 1)=5(3X+2)-1
3. 3(X-7) -2{9-4(2-X)} = 22
各位帮下忙
No.1:3-x-6=-5x+5
4x=8
x=2
No.2:14x-7-12x+3=15x+10-1
-13x=13
x=-1