8-7y-3(2-3y)=4(y-1)-(y+1)

Solution for 8-7y-3(2-3y)=4(y-1)-(y+1) equation:

8-7y-3(2-3y)=4(y-1)-(y+1)

We simplify the equation to the form, which is simple to understand 
8-7y-3(2-3y)=4(y-1)-(y+1)

Reorder the terms in parentheses
8-7y+(-6+9y)=4*(y-1)-(y+1)

Remove unnecessary parentheses
+8-7y-6+9y=+4+*(+y-1+)-(+y+1+)

Reorder the terms in parentheses
8-7y-6+9y=+(+4y-4)-(y+1)

Remove unnecessary parentheses
+8-7y-6+9y=+4y-4-(+y+1+)

Remove unnecessary parentheses
8-7y-6+9y=+4y-4-1y-1

We move all terms containing y to the left and all other terms to the right. 
-7y+9y-4y+1y=-4-1-8+6

We simplify left and right side of the equation. 
-1y=-7

We divide both sides of the equation by -1 to get y. 
y=7