SOLUTION: If 4(x+y)(x-y) = 40 and x - y = 20, what is the value of x + y?

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Question 93457: If 4(x+y)(x-y) = 40 and x - y = 20, what is the value of x + y?
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
4(X+Y)*20=40
80(X+Y)=40
(X+Y)=40/80
(X+Y)=.5 ANSWER.