document.write( "Question 180598: y=2x and x+y=12 \n" ); document.write( "

Algebra.Com's Answer #135360 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
1. $\"y=2x\"$
\n" ); document.write( "2. $\"x%2By=12\"$
\n" ); document.write( "Directly substitute eq. 1 into eq. 2 and solve for x.
\n" ); document.write( "2. $\"x%2By=12\"$
\n" ); document.write( " $\"x%2B%282x%29=12\"$
\n" ); document.write( " $\"3x=12\"$
\n" ); document.write( " $\"highlight%28x=4%29\"$
\n" ); document.write( "Now use either equation to solve for y. Eq. 1 is quickest.
\n" ); document.write( "1. $\"y=2x\"$
\n" ); document.write( " $\"y=2%284%29\"$
\n" ); document.write( " $\"highlight%28y=8%29\"$ \n" ); document.write( "

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