document.write( "Question 769576: Substitution.
\n" ); document.write( "-3x-3y=3 and y=-5x-17 \n" ); document.write( "

Algebra.Com's Answer #468929 by MathLover1(20849) $\"\"$ $\"About$

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\n" ); document.write( " $\"-3x-3y=3\"$ ..eq.1 and
\n" ); document.write( " $\"y=-5x-17\"$ ...eq.2
\n" ); document.write( "___________________substitute $\"y\"$ in eq.1 \r
\n" ); document.write( "\n" ); document.write( " $\"-3x-3%28-5x-17%29=3\"$ ..eq.1 .......solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-3x%2B15x%2B51=3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"12x=3-51\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"12x=-48\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=-48%2F12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=-4\"$ \r
\n" ); document.write( "\n" ); document.write( "now find $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=-5x-17\"$ ...eq.2\r
\n" ); document.write( "\n" ); document.write( " $\"y=-5%28-4%29-17\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=20-17\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=3\"$ \r
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