Question 10945
5-2(y+1)=21
5-2*y + (-2)*1 = 21
5 - 2y - 2 = 21
5 - 2 -2y = 21
3 - 2y = 21
-2y = 21 - 3
-2y = 18
y = 18 : (-2)
y = -9