document.write( "Question 377294: Solve using substitution
\n" ); document.write( "y=x-4
\n" ); document.write( "x+3y=12 \n" ); document.write( "

Algebra.Com's Answer #268077 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"y=x-4\"$
\n" ); document.write( "2. $\"x%2B3y=12\"$
\n" ); document.write( "Substitute eq. 1 into eq. 2,
\n" ); document.write( " $\"x%2B3%28x-4%29=12\"$
\n" ); document.write( " $\"x%2B3x-12=12\"$
\n" ); document.write( " $\"4x=24\"$
\n" ); document.write( " $\"highlight%28x=6%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"y=6-4\"$
\n" ); document.write( " $\"highlight%28y=2%29\"$ \n" ); document.write( "

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