document.write( "Question 525778: m+n=20
\n" ); document.write( "m-n=-4 \n" ); document.write( "

Algebra.Com's Answer #348205 by Alan3354(69443) $\"\"$ $\"About$

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m+n=20
\n" ); document.write( "m-n=-4
\n" ); document.write( "--------- Add \n" ); document.write( "

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