document.write( "Question 312104: what is the answer to this equation using substitution 3x+6y=48,-5x+6y=32 \n" ); document.write( "

Algebra.Com's Answer #223172 by Fombitz(32388) $\"\"$ $\"About$

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$\"3x%2B6y=48\"$
\n" ); document.write( "1. $\"x%2B2y=16\"$
\n" ); document.write( "2. $\"-5x%2B6y=32\"$
\n" ); document.write( "From eq. 1,
\n" ); document.write( " $\"x%2B2y=16\"$
\n" ); document.write( " $\"-x=2y-16\"$
\n" ); document.write( " $\"-5x=10y-80\"$
\n" ); document.write( "Substitute into eq. 2,
\n" ); document.write( " $\"-5x%2B6y=32\"$
\n" ); document.write( " $\"10y-80%2B6y=32\"$
\n" ); document.write( " $\"16y=112\"$
\n" ); document.write( " $\"highlight%28y=7%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"-x=2y-16\"$
\n" ); document.write( " $\"-x=2%287%29-16\"$
\n" ); document.write( " $\"-x=-2\"$
\n" ); document.write( " $\"highlight%28x=2%29\"$ \n" ); document.write( "

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