document.write( "Question 841823: how do you slove y=-x+4 y=3x by substitution
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Algebra.Com's Answer #507468 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Simply by substituting,
\n" ); document.write( " $\"y=-x%2B4\"$
\n" ); document.write( " $\"3x=-x%2B4\"$ Add x to both sides.
\n" ); document.write( " $\"4x=4\"$ Divide both sides by 4.
\n" ); document.write( " $\"x=1\"$
\n" ); document.write( "They go back to either equation.
\n" ); document.write( " $\"y=3x\"$
\n" ); document.write( " $\"y=3%281%29\"$
\n" ); document.write( " $\"y=3\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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