document.write( "Question 68108: 5x-2y=4
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Algebra.Com's Answer #48387 by Edwin McCravy(20056) $\"\"$ $\"About$

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        5x - 2y = 4\r\n" );
document.write( "        3x +  y = 9\r\n" );
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document.write( "Solve the second equation for y\r\n" );
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document.write( "         3x + y = 9\r\n" );
document.write( "              y = 9 - 3x\r\n" );
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document.write( "Substitute (9 - 3x) for y in the first equation:\r\n" );
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document.write( "        5x - 2y = 4\r\n" );
document.write( " 5x - 2(9 - 3x) = 4\r\n" );
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document.write( "Solve for x\r\n" );
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document.write( "   5x - 18 + 6x = 4\r\n" );
document.write( "       11x - 18 = 4\r\n" );
document.write( "            11x = 22\r\n" );
document.write( "              x = 2\r\n" );
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document.write( "Substitute 2 for x in the equation where\r\n" );
document.write( "you solved for y:\r\n" );
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document.write( "              y = 9 - 3x\r\n" );
document.write( "              y = 9 - 3(2)\r\n" );
document.write( "              y = 9 - 6\r\n" );
document.write( "              y = 3\r\n" );
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document.write( "So the solution is (x,y) = (2,3)\r\n" );
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document.write( "Edwin

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