Sagot :
1)3(x+1)=1-2x
3x+1=1-2x
5x=0
x=0
2)2(3x-1)=3x+7
6x - 2 = 3x +7
3x = 9
x= 9/3
x= 3
3)3x-4(x-1)=2(5-2x)
3x-4x+4=10-4x
-1x+4x=10-4
3x=6
x=2
4)3(2y-1)+y-2=5(1+y)
6y-3+y-2=5+5y
7y-5y=5+2+3
2y=10
y=5
5)2(3x-1)-4(1+x)=8-2(1+2x)
6x-2-4-4x=8-2-4x
6x-4x+4x=8-2+4+2
6x=12
x=2
6)4(x-3)-2x+7-4(8x+1)=0
4x-12-2x+7-32x-4=0
4x-2x-32x=4-7+12
-30x=9
x= -9/30