document.write( "Question 397609: x-2y+10=0 and 5x+4y+8=0 \n" ); document.write( "

Algebra.Com's Answer #281779 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"x-2y%2B10=0\"$
\n" ); document.write( "2. $\"5x%2B4y%2B8=0\"$
\n" ); document.write( "Multiply eq. 1 by 2 and add to eq. 2,
\n" ); document.write( " $\"2x-4y%2B20%2B5x%2B4y%2B8=0\"$
\n" ); document.write( " $\"7x%2B28=0\"$
\n" ); document.write( " $\"7x=-28\"$
\n" ); document.write( " $\"x=-4\"$
\n" ); document.write( "Then use either equation to solve for $\"y\"$ .
\n" ); document.write( " $\"-4-2y%2B10=0\"$
\n" ); document.write( " $\"-2y%2B6=0\"$
\n" ); document.write( " $\"-2y=-6\"$
\n" ); document.write( " $\"y=3\"$
\n" ); document.write( " \n" ); document.write( "

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