SOLUTION: How do I solve this problem by substitution? 2x+y=0 3x-2y=7

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Question 214376: How do I solve this problem by substitution?
2x+y=0
3x-2y=7
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How do I solve this problem by substitution?
2x+y=0 --> y = -2x
3x-2y=7
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Sub for y into 2nd eqn
2x - 2(-2x) = 7
7x = 7
x = 1
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y = -2