document.write( "Question 680090: How do i solve this?
\n" ); document.write( "-Systems of nonlinear equations\r
\n" ); document.write( "\n" ); document.write( "x+3y=12
\n" ); document.write( "xy=9
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Algebra.Com's Answer #422216 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
x+3y=12
\n" ); document.write( "xy=9 --> y = 9/x
\n" ); document.write( "--------
\n" ); document.write( "sub for y in the 1st eqn
\n" ); document.write( "x + 27/x = 12
\n" ); document.write( "\"x%5E2+-+12x+%2B+27+=+0\"
\n" ); document.write( "(x-3)*(x-9) = 0
\n" ); document.write( "x = 3, y = 3
\n" ); document.write( "x = 9, y = 1\r
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