Answer:
step 2
Step-by-step explanation:
step 1 is good: -5x + 8 = 7
step 2 (error): meant to subtract 8 on both sides
-5x = 7 - 8
-5x = -1
step 3 : divide -5 on both sides
x = -1 / -5
x = 1/5
x = 20 - -5 = 20 + 5 = 25
y = 16 - 1 = 15