SOLUTION: what is y = -x + 9 if y = 2x ?

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Question 710837: what is y = -x + 9 if y = 2x ?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
what is y = -x + 9 if y = 2x ?
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What is what?
y = -x + 9 is an equation in x & y.