SOLUTION: How do I solve this system by substitution? -2y=-x-7 4x+2y=22

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Question 416229: How do I solve this system by substitution?
-2y=-x-7
4x+2y=22
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
-2y=-x-7
divide by -1
2y=x+7
substitute the value of 2y in
4x+2y=22
4x+x+7 = 22
5x+7=22
5x=22-7
5x=15
x=3
y=5