document.write( "Question 313450: 4x+3y=-5
\n" ); document.write( "-9x+y =50
\n" ); document.write( "solve using the substitution method \n" ); document.write( "

Algebra.Com's Answer #224165 by rfer(16322) $\"\"$ $\"About$

You can put this solution on YOUR website!
-9x+y=50 y=50+9x
\n" ); document.write( "4x+3(50+9x)=-5
\n" ); document.write( "4x+150+27x=-5
\n" ); document.write( "31x=-155
\n" ); document.write( "x=-5
\n" ); document.write( "---------------
\n" ); document.write( "-9*-5+y=50
\n" ); document.write( "45+y=50
\n" ); document.write( "y=5
\n" ); document.write( "---------------
\n" ); document.write( "proof
\n" ); document.write( "-9*-5+5=50 \n" ); document.write( "

\n" );