document.write( "Question 884364: solve by substitution method 15x-20y=-1
\n" ); document.write( " 15y=2+5x
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #534266 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
1. $\"15x-20y=-1\"$
\n" ); document.write( "2. $\"15y=2%2B5x\"$
\n" ); document.write( "From eq. 2,
\n" ); document.write( " $\"5x=15y-2\"$
\n" ); document.write( " $\"15x=45y-6\"$
\n" ); document.write( "Substitute into eq. 1,
\n" ); document.write( " $\"45y-6-20y=-1\"$
\n" ); document.write( " $\"25y=5\"$
\n" ); document.write( " $\"y=5%2F25\"$
\n" ); document.write( " $\"highlight%28y=1%2F5%29\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"5x=15%281%2F5%29-2\"$
\n" ); document.write( " $\"5x=3-2\"$
\n" ); document.write( " $\"5x=1\"$
\n" ); document.write( " $\"highlight%28x=1%2F5%29\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );