SOLUTION: Answer to. Add (4x+5y)+(-5x+7y) simplify the answer?

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Question 666420: Answer to. Add (4x+5y)+(-5x+7y) simplify the answer?
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
Associate the xs and ys.
(4x-5x) + (5y+7y) = -x + 12y