SOLUTION: Solve by elimination 3x-5y=17 y=-7

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Question 790348: Solve by elimination
3x-5y=17
y=-7
Answer by waynest(281) About Me  (Show Source):
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3x - 5y = 17
y = -7
3x - 5(-7) = 17
3x + 35 = 17
3x + 35 - 35 = 17 - 35
3x = -18
3x/3 = -18/3
x = -3
check:
3(-6) - 5(-7) = 17
-18 + 35 = 17
17 = 17