3x-1=2(x-2)
3x-1=2x-4
3x-2x=-4+1
x=-3
3(x+5)=7-5x
3x+15=7-5x
3x+5x=7-15
8x=-8
x=-1
19(y-9)=3(y+7)
19y-171=3y+21
19y-3y=21+171
16y=192
y=12
4(x-9)=3(x-8)
4x-36=3x-24
4x-3x=-24+36
x=12
3(2x-9)=5(x-4)
6x-27=5x-20
6x-5x=-20+27
x=7
7(3-2x)=15(1-x)
21-14x=15-15x
-14x+15x=15-21
x=-6