document.write( "Question 895002: Solve using substitution:
\n" ); document.write( "Y-x=4
\n" ); document.write( "3X+y=16 \n" ); document.write( "

Algebra.Com's Answer #542603 by Fombitz(32388) $\"\"$ $\"About$

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$\"y-x=4\"$
\n" ); document.write( " $\"3x%2By=16\"$
\n" ); document.write( "From the first equation,
\n" ); document.write( " $\"y=x%2B4\"$
\n" ); document.write( "Substitute into the second equation,
\n" ); document.write( " $\"3x%2B%28x%2B4%29=16\"$
\n" ); document.write( " $\"4x%2B4=16\"$
\n" ); document.write( " $\"4x=12\"$
\n" ); document.write( " $\"x=3\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"y=3%2B4\"$
\n" ); document.write( " $\"y=7\"$
\n" ); document.write( " \n" ); document.write( "

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