document.write( "Question 983240: 3x-y=-2 5x+2y=15 \n" ); document.write( "

Algebra.Com's Answer #604135 by macston(5194) $\"\"$ $\"About$

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\n" ); document.write( "3x-y=-2
\n" ); document.write( "3x+2=y Use this to substitute for y below.
\n" ); document.write( ".
\n" ); document.write( "5x+2y=15 Substitute for y from above.
\n" ); document.write( "5x+2(3x+2)=15
\n" ); document.write( "5x+6x+4=15
\n" ); document.write( "11x=11
\n" ); document.write( "x=1
\n" ); document.write( ".
\n" ); document.write( "3x-y=-2
\n" ); document.write( "3(1)-y=-2
\n" ); document.write( "3-y=-2
\n" ); document.write( "-y=-5
\n" ); document.write( "y=5
\n" ); document.write( ".
\n" ); document.write( "CHECK:
\n" ); document.write( "3x-y=-2
\n" ); document.write( "3(1)-5=-2
\n" ); document.write( "3-5=-2
\n" ); document.write( "-2=-2
\n" ); document.write( ".
\n" ); document.write( "5x+2y=15
\n" ); document.write( "5(1)+2(5)=15
\n" ); document.write( "5+10=15
\n" ); document.write( "15=15
\n" ); document.write( " \n" ); document.write( "

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