Question

me ajuuuudeemmm.nao consigo fazer essa conta
10y-5(1-y)=3(2y-2)-20

Answer 1

10y-5(1-y)=3(2y-2)-20
10y-5-5y=6y-6-20
15y-6y=-26+5
9y=-21
y=$\frac{-21}{9}$
y=-2,333333