document.write( "Question 1122192: Use a software program or a graphing utility to solve the system of linear
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\n" ); document.write( "\n" ); document.write( "x1 − 2x2 + 5x3 − 3x4 = 23.2
\n" ); document.write( "x1 + 4x2 − 7x3 − 2x4 = 45.6
\n" ); document.write( "3x1 − 5x2 + 7x3 + 4x4 = 29.8
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Algebra.Com's Answer #738269 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Use your TI-83 or 84 calculator. Use 2ND x-1\r\n" );
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document.write( "Enter this as a 3x5 matrix:\r\n" );
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document.write( "Press 2ND x-1\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\r\n" );
document.write( "Press 2ND x-1\r\n" );
document.write( "Press 1\r\n" );
document.write( "Type a right parenthesis\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Read this rounded to three decimal places:\r\n" );
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document.write( "Interpret that as:\r\n" );
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document.write( "Simplify as\r\n" );
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document.write( "Solve for the x's\r\n" );
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document.write( "Replace the x4's by t\r\n" );
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document.write( "Edwin

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