document.write( "Question 70127: Solve the system by addition:\r
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document.write( "5x-4y=-5
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document.write( "x-2y=-7 \n" );
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Algebra.Com's Answer #50041 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! 5X-4Y=-5 NOW MULTIPLY THE SECOND EQUATION BY -5 & ADD \n" ); document.write( "-5X+10Y=35 \n" ); document.write( "-------------------------- \n" ); document.write( "6Y=30 \n" ); document.write( "Y=30/6 \n" ); document.write( "Y=5 ANSWER NOW SUBSTITUTE 5 FOR Y & SOLVE FOR X \n" ); document.write( "5X-4*5=-5 \n" ); document.write( "5X-20=-5 \n" ); document.write( "5X=-5+20 \n" ); document.write( "5X=15 \n" ); document.write( "X=15/5 \n" ); document.write( "X=3 ANSWER. \n" ); document.write( "PROOF \n" ); document.write( "5*3-4*5=-5 \n" ); document.write( "15-20=-5 \n" ); document.write( "-5=-5 \n" ); document.write( " \n" ); document.write( " |