document.write( "Question 615024: x+y=-8
\n" ); document.write( "y=2x+7 \n" ); document.write( "
Algebra.Com's Answer #386867 by nerdybill(7384)\"\" \"About 
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x+y=-8
\n" ); document.write( "y=2x+7
\n" ); document.write( ".
\n" ); document.write( "rewrite second equation:
\n" ); document.write( " x+y=-8
\n" ); document.write( "-2x+y= 7
\n" ); document.write( ".
\n" ); document.write( "multiply bottome equation by -1 and add both equations together:
\n" ); document.write( " x+y=-8
\n" ); document.write( "2x-y=-7
\n" ); document.write( "-----------
\n" ); document.write( "3x = -15
\n" ); document.write( "x = -5
\n" ); document.write( ".
\n" ); document.write( "substitute above into:
\n" ); document.write( "x+y=-8
\n" ); document.write( "-5+y=-8
\n" ); document.write( "y = -3
\n" ); document.write( ".
\n" ); document.write( "answer:(x,y) = (-5, -3) \n" ); document.write( "
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