document.write( "Question 422207: solve the system of equations by substitution
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document.write( "5x+y=-4
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document.write( "y=-x \n" );
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Algebra.Com's Answer #294713 by rfer(16322)![]() ![]() ![]() You can put this solution on YOUR website! 5x-x=-4 \n" ); document.write( "4x=-4 \n" ); document.write( "x=-1 \n" ); document.write( "------ \n" ); document.write( "5*-1+y=-4 \n" ); document.write( "-5+y=-4 \n" ); document.write( "y=+1 \n" ); document.write( "------------- \n" ); document.write( "proof \n" ); document.write( "y=-x \n" ); document.write( "1=--1 \n" ); document.write( " |