Answer:
63
Explanation:
simplify both sides of the equation
-7 = y - 70
flip the equation
y - 70 = -7
add 70 to both sides
y - 70 + 70 = -7 + 70
y = 63
63=y
Add 70 to both sides to cancel it out. -7+-70=63. That leaves you with 63=y
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