document.write( "Question 284424: x+y=7 and 2x+3y=19 can you solve this problem and what should I study to understand this problem. \n" ); document.write( "
Algebra.Com's Answer #206398 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "I placed an equal sign where I think you meant to have typed one.\r\n" );
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document.write( "Equation 1:     x + y = 7\r\n" );
document.write( "Equation 2:   2x + 3y = 19\r\n" );
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document.write( "Solve equation 1 for y:\r\n" );
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document.write( "                x + y = 7\r\n" );
document.write( "Equation 3:         y = 7 - x\r\n" );
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document.write( "Substitute (7 - x) for y in equation 2:\r\n" );
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document.write( "              2x + 3y = 19\r\n" );
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document.write( "        2x + 3(7 - x) = 19\r\n" );
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document.write( "         2x + 21 - 3x = 19\r\n" );
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document.write( "               21 - x = 19\r\n" );
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document.write( "                   -x = -2\r\n" );
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document.write( "                    x = 2\r\n" );
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document.write( "Substitute (2) for x is equation 3:\r\n" );
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document.write( "                    y = 7 - x   \r\n" );
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document.write( "                    y = 7 - (2)\r\n" );
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document.write( "                    y = 5\r\n" );
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document.write( "So the solution is x = 2 and y = 5.\r\n" );
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document.write( "You should go to this website to learn more about this.\r\n" );
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document.write( "http://www.purplemath.com/modules/systlin4.htm\r\n" );
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document.write( "Edwin

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