document.write( "Question 298763: Using the Gauss-Jordan elimination method, solve the following linear system.
\n" ); document.write( "You can use a calculator or Excel Minverse, Mmult to get your answer\r
\n" ); document.write( "\n" ); document.write( "- 10 x + 14 y + 3 z = 74
\n" ); document.write( "+ x + 17 y + 9 z = 85
\n" ); document.write( "- 13 x - 8 y + 3 z = 14
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Algebra.Com's Answer #214838 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"system%28-10x%2B14y%2B3z=74%2C%0D%0Ax%2B17y%2B9z+=+85%2C%0D%0A-13x-8y%2B3z=14%29\"\r\n" );
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document.write( "Put all those red numbers in a 3x4 augmented matrix\r\n" );
document.write( "like this:\r\n" );
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document.write( "On your TI-83 or TI-84,\r\n" );
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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( "Prees the right arrow twice to highlight EDIT\r\n" );
document.write( "Press ENTER\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( "Type -10, \r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Type 14,\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Type 3,\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Type 74\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Type 1\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "...\r\n" );
document.write( "continue typing in all the rest of the elements \r\n" );
document.write( "in the matrix, pressing ENTER after each. Then\r\n" );
document.write( "...\r\n" );
document.write( "Press 2ND\r\n" );
document.write( "Press MODE (QUIT)\r\n" );
document.write( "Press 2ND\r\n" );
document.write( "Press x-1 (MATRIX)\r\n" );
document.write( "Press right arrow to highlight MATH\r\n" );
document.write( "Press up arrow 5 times to highlight B:rref(\r\n" );
document.write( "Press ENTER  you should see rref( on the screen\r\n" );
document.write( "Press 2nd\r\n" );
document.write( "Press x-1 (MATRIX)\r\n" );
document.write( "Press ENTER  you should see rref([A]\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 -2]\r\n" );
document.write( "     [0 1 0 3 ]\r\n" );
document.write( "     [0 0 1 4 ]]\r\n" );
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document.write( "Interpret this as the system:\r\n" );
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document.write( "\"system%281x%2B0y%2B0z=-2%2C0x%2B1y%2B1z=3%2C+0x%2B0y%2B1z=4%29\"\r\n" );
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document.write( "or\r\n" );
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document.write( "\"system%28x=-2%2Cy=3%2Cz=4%29\"  \r\n" );
document.write( "Edwin
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