document.write( "Question 391942: solve system of equations by addition method.
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document.write( "x+y=-7
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document.write( "x-y=9 \n" );
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Algebra.Com's Answer #278116 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Add the 2 equations. \n" ); document.write( " \n" ); document.write( " |