8y-3(2y-3)=7y-2(5y+8)
8y-6y+9=7y-10y-16
2y+9=-3y-16
5y=-25
y=-5
5(2y-9)+6y=4(3y-2)-21
10y-45+6y=12y-8-21
16y-45=12y-29
4y=16
y=4
5y+7(3-y)=3(5-2y)-6
5y+21-7y=15-6y-6
-2y+21=-6y+9
4y=-12
y=-3
7y-4(3y+5)=2-3(4y-9)
7y-12y-20=2-12y+27
-5y-20=-12y+29
7y=49
y=7