document.write( "Question 334985: If a+b=15, a+c=16, and b+c=11, how do you get a b and c on the calculator? \n" ); document.write( "
Algebra.Com's Answer #240061 by Edwin McCravy(20086)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"system%28a%2Bb=15%2C%0D%0Aa%2Bc=16%2C%0D%0Ab%2Bc=11%29\"\r\n" );
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document.write( "Write it this way, so that all letters appear in all equations and\r\n" );
document.write( "every letter has a coefficient showing:\r\n" );
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document.write( "\"system%281a%2B1b%2B0c=15%2C%0D%0A1a%2B0b%2B1c=16%2C%0D%0A0a%2B1b%2B1c=11%29\"\r\n" );
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document.write( "On you TI-83 or TI-84,\r\n" );
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document.write( "Press ON\r\n" );
document.write( "Press CLEAR\r\n" );
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document.write( "Press 2nd\r\n" );
document.write( "Press x-1  (MATRIX)\r\n" );
document.write( "Press right arrow key twice to highlight EDIT\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press 3\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 4\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 0\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 15\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 0\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 16\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 0\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press 11\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "\r\n" );
document.write( "Press 2nd\r\n" );
document.write( "Press MODE (QUIT)\r\n" );
document.write( "\r\n" );
document.write( "Press 2nd\r\n" );
document.write( "Press x-1  (MATRIX)\r\n" );
document.write( "Press right arrow key to highlight MATH\r\n" );
document.write( "Press ALPHA\r\n" );
document.write( "Press APPS\r\n" );
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document.write( "You should see  rref(\r\n" );
document.write( "\r\n" );
document.write( "Press 2nd\r\n" );
document.write( "Press x-1  (MATRIX)\r\n" );
document.write( "Press 1\r\n" );
document.write( "Press ENTER\r\n" );
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document.write( "You should see \r\n" );
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document.write( "rref([A]\r\n" );
document.write( "    [[1 0 0 10]\r\n" );
document.write( "     [0 1 0 5 ] \r\n" );
document.write( "     [0 0 1 6 ]]\r\n" );
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document.write( "The answers are a=10, b=5, c=6   \r\n" );
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document.write( "Edwin
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