document.write( "Question 93457: If 4(x+y)(x-y) = 40 and x - y = 20, what is the value of x + y? \n" ); document.write( "
Algebra.Com's Answer #68039 by checkley75(3666)\"\" \"About 
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4(X+Y)*20=40
\n" ); document.write( "80(X+Y)=40
\n" ); document.write( "(X+Y)=40/80
\n" ); document.write( "(X+Y)=.5 ANSWER.
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