3-Y+2(5-y)=4y-8 помогите!

Question

3-Y+2(5-y)=4y-8 помогите!

Answer 1

3-y+2(5-y)=4y-8
-y-2y-4y=-3-10-8
-7y=-21
y=3 

Answer 2

3-y+2(5-y)=4y-8
3-y+10-2y=4y-8
-7y=-21 (делим на минус 7)
y=3