document.write( "Question 279819: how do u solve the following problem:
\n" ); document.write( "y=3x
\n" ); document.write( "x+y=4 \n" ); document.write( "

Algebra.Com's Answer #203385 by JBarnum(2146) $\"\"$ $\"About$

You can put this solution on YOUR website!
use substitution method:
\n" ); document.write( "y=3x
\n" ); document.write( "x+y=4
\n" ); document.write( " $\"x%2B%283x%29=4\"$
\n" ); document.write( " $\"4x=4\"$
\n" ); document.write( " $\"x=1\"$
\n" ); document.write( " $\"y=3x\"$
\n" ); document.write( " $\"y=3%281%29\"$
\n" ); document.write( " $\"y=3\"$
\n" ); document.write( "

\n" ); document.write( "elimination method:
\n" ); document.write( " $\"3x-y=0\"$
\n" ); document.write( " $\"x%2By=4\"$ add
\n" ); document.write( " $\"4x=4\"$
\n" ); document.write( " $\"x=1\"$
\n" ); document.write( " $\"y=3x\"$
\n" ); document.write( " $\"y=3%281%29\"$
\n" ); document.write( " $\"y=3\"$
\n" ); document.write( " \n" ); document.write( "

\n" );