document.write( "Question 804593: solve using elimination method: 3x-4y=9 and -3x+2y=9
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Algebra.Com's Answer #484855 by mananth(16946) $\"\"$ $\"About$

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3 x -4 y = 9 .............1
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\n" ); document.write( "-3 x + 2 y = 9 .............2 \r
\n" ); document.write( "\n" ); document.write( "add (1) & (2)\r
\n" ); document.write( "\n" ); document.write( "-2y=18
\n" ); document.write( "/2
\n" ); document.write( "y=-9\r
\n" ); document.write( "\n" ); document.write( "plug y in (1)\r
\n" ); document.write( "\n" ); document.write( "3x-4y=9
\n" ); document.write( "3x-4(-9)=9
\n" ); document.write( "3x+36=9
\n" ); document.write( "3x=-27
\n" ); document.write( "/3
\n" ); document.write( "x=-9 \n" ); document.write( "

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