Question

12-(1+3y)=5(y-1)+17 ????

Answer 1

1+3y-y+1=5+17-12
2y+2=22-12
2y+2=10
2y=10-2
2y=8
y=8/2
y=4

Answer 2

12 - (1 + 3y) = 5.(y - 1) + 17
12 - 1 - 3y = 5y - 5 + 17
11 - 3y = 5y + 12
11 - 12 = 5y + 3y
- 1 = 8y
8y = - 1
y = - 1/8