Question 792224
y + 7 = 5 - 9y
y + 9y + 7 - 7 = 5 - 7 - 9y + 9y
10y = -2
10y/10 = -2/10
y = -1/5

check:
-1/5 + 7 = 5 - 9(-1/5)
34/5 = 34/5