document.write( "Question 479217: Solve each system by the addition method.\r
\n" ); document.write( "\n" ); document.write( "2x + 4y = 28
\n" ); document.write( "x - 2y = 10 \n" ); document.write( "
Algebra.Com's Answer #328342 by nerdybill(7384)\"\" \"About 
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2x + 4y = 28
\n" ); document.write( "x - 2y = 10
\n" ); document.write( ".
\n" ); document.write( "Multiply bottom equation by 2 and combine both equations:
\n" ); document.write( "2x + 4y = 28
\n" ); document.write( "2x - 4y = 20
\n" ); document.write( "---------------
\n" ); document.write( "4x = 48
\n" ); document.write( "x = 12
\n" ); document.write( ".
\n" ); document.write( "plug above back into:
\n" ); document.write( "x - 2y = 10
\n" ); document.write( "12 - 2y = 10
\n" ); document.write( "-2y = -2
\n" ); document.write( "y = 1
\n" ); document.write( ".
\n" ); document.write( "Solution: (x,y) = (12, 1)\r
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