document.write( "Question 337616: solve using the substitution method y = 2x - 5, 3x + y = 15 \n" ); document.write( "

Algebra.Com's Answer #242082 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
1. $\"y+=+2x+-5\"$
\n" ); document.write( "2. $\"3x+%2B+y+=+15\"$
\n" ); document.write( "Substitute eq. 1 into eq. 2,
\n" ); document.write( " $\"3x%2B%282x-5%29=15\"$
\n" ); document.write( " $\"5x-5=15\"$
\n" ); document.write( " $\"5x=20\"$
\n" ); document.write( " $\"highlight%28x=4%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"y=2%284%29-5\"$
\n" ); document.write( " $\"y=8-5\"$
\n" ); document.write( " $\"highlight%28y=3%29\"$ \n" ); document.write( "

\n" );