document.write( "Question 371480: 
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document.write( "I need the answer and need to know how you got the answer for a solving systems\r\n" );
document.write( "using elimination.   7x + 2y =  10\r\n" );
document.write( "                    -7x +  y = -16
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Algebra.Com's Answer #264621 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Add corresponding terms of the two equations and the x-terms\r\n" );
document.write( "will cancel out automatically since one is 7x and the other is -7x:\r\n" );
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document.write( " 7x + 2y =  10\r\n" );
document.write( "-7x +  y = -16\r\n" );
document.write( "--------------\r\n" );
document.write( "      3y =  -6\r\n" );
document.write( "      \"3y%2F3\" = \"-6%2F3\"\r\n" );
document.write( "       y =  -2\r\n" );
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document.write( "Substitute -2 for y in either equation:\r\n" );
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document.write( "    7x + 2y = 10\r\n" );
document.write( " 7x + 2(-2) = 10\r\n" );
document.write( "     7x - 4 = 10\r\n" );
document.write( "         +4   +4\r\n" );
document.write( "    ------------\r\n" );
document.write( "     2x     = 14\r\n" );
document.write( "         \"2x%2F2\" = \"14%2F2\"\r\n" );
document.write( "          x = 7 \r\n" );
document.write( "          \r\n" );
document.write( "Edwin
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