document.write( "Question 881527: 3(x+y)=7(y-x),5(3x-y)=x+3 \n" ); document.write( "

Algebra.Com's Answer #532549 by Fombitz(32388) $\"\"$ $\"About$

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$\"3%28x%2By%29=7%28y-x%29\"$
\n" ); document.write( " $\"3x%2B3y=7y-7x\"$
\n" ); document.write( " $\"10x-4y=0\"$
\n" ); document.write( "1. $\"5x-2y=0\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"5%283x-y%29=x%2B3\"$
\n" ); document.write( " $\"15x-5y=x%2B3\"$
\n" ); document.write( "2. $\"14x-5y=3\"$
\n" ); document.write( "Multiply eq. 1 by 5 and eq. 2 by 2 and subtract.
\n" ); document.write( " $\"25x-10y-%2828x-10y%29=0-6\"$
\n" ); document.write( " $\"-3x=-6\"$
\n" ); document.write( " $\"x=2\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"5%282%29-2y=0\"$
\n" ); document.write( " $\"2y=10\"$
\n" ); document.write( " $\"y=5\"$
\n" ); document.write( " \n" ); document.write( "

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