document.write( "Question 804092: x - y = 0
\n" ); document.write( "2x + y = 12 \n" ); document.write( "
Algebra.Com's Answer #484602 by richwmiller(17219)\"\" \"About 
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solve by substitution or elimination
\n" ); document.write( "sub\r
\n" ); document.write( "\n" ); document.write( "x-y=0
\n" ); document.write( "x=y
\n" ); document.write( "2x+x=12
\n" ); document.write( "3x=12
\n" ); document.write( "x=4
\n" ); document.write( "y=4
\n" ); document.write( "eliminate
\n" ); document.write( "x-y=0
\n" ); document.write( "2x+y=12
\n" ); document.write( "add
\n" ); document.write( "3x=12
\n" ); document.write( "x=4
\n" ); document.write( "4-y=0
\n" ); document.write( "4=y
\n" ); document.write( " \n" ); document.write( "
\n" );