document.write( "Question 412529: x-y=10
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Algebra.Com's Answer #289750 by algebrahouse.com(1659)\"\" \"About 
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x - y = 10-------> -x + y = -10 {multiplied top equation by -1}
\n" ); document.write( "5x - y = -6------> 5x - y = -6 {bottom equation stays the same}\r
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\n" ); document.write( "\n" ); document.write( "4x = -16 {added the two new equations together}
\n" ); document.write( "x = -4 {divided both sides by 4}\r
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\n" ); document.write( "\n" ); document.write( "x - y = 10 {top original equation}
\n" ); document.write( "-4 - y = 10 {substituted -4, in for x, into top equation}
\n" ); document.write( "-y = 14 {added 4 to both sides}
\n" ); document.write( "y = -14 {divided both sides by -1}\r
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\n" ); document.write( "\n" ); document.write( "x = -4 and y = -14
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