Answer:
y = -10
Step-by-step explanation:
Step 1: Substitute -5 for x in the equation -5x + 7y = 5x + 2y
-5x + 7y = 5x + 2y
-5(-5) + 7y = 5(-5) + 2y
Step 2: Solve for y
-5(-5) + 7y = 5(-5) + 2y
25 + 7y + 25 - 7y = -25 + 2y + 25 - 7y
50 / -5 = -5y / -5
-10 = y
Answer: y = -10
