document.write( "Question 87114: how do you solve for example: y=3x
\n" ); document.write( " x+y=12
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Algebra.Com's Answer #63073 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
solve for example: y=3x ; x+y=12
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\n" ); document.write( "Substitute to get:
\n" ); document.write( "x+3x=12
\n" ); document.write( "4x = 12
\n" ); document.write( "x = 3
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\n" ); document.write( "Substitute to solve for y:
\n" ); document.write( "y=3*3=9
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\n" ); document.write( "System solution: x=3,y=9
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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