Question 210474
2y+18=12-6(y+7)
2y+18=12-6y-42
2y+6y=12-42-18
8y=-48
y=-48/8
y=-6 ans.
Proof:
2*-6+18=12-6(-6+7)
-12+18=12-6*1
6=12-6
6=6