document.write( "Question 1092360: 2x-y=4
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Algebra.Com's Answer #706966 by ikleyn(52909) $\"\"$ $\"About$

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document.write( "2x - y = 4,    (1)\r\n" );
document.write( " x + y = 5.    (2)\r\n" );
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document.write( "Add the two equations. The \"y\"-s will cancel and you will get a single equation for only one unknown x:\r\n" );
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document.write( "2x + x = 4 + 5 = 9  ====>  3x = 9  ===>  x =  = 3.\r\n" );
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document.write( "Thus you just found one unknown, x. It is 3.\r\n" );
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document.write( "Next, to find y, substitute x= 3 into equation  (2) and get\r\n" );
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document.write( "y = 5 - x = 5 - 3 = 2.\r\n" );
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document.write( "Answer. The solution is xx = 3,  y = 2.\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is how the Elimination method works.\r
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