document.write( "Question 983834: The sum of 2 numbers is 21 the difference of the two numbers? \n" ); document.write( "
Algebra.Com's Answer #604631 by Alan3354(69443)\"\" \"About 
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The sum of 2 numbers is 21 the difference of the two numbers?
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\n" ); document.write( "x + y = 21
\n" ); document.write( "x - y = 21 - 2y
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