document.write( "Question 865898: Find z by the use of determinant : 3x-4y+2z+8=0, x+5y-3z+2=0, 5x+3y-z+6=0 \n" ); document.write( "

Algebra.Com's Answer #521993 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "3x-4y+2z+8=0, x+5y-3z+2=0, 5x+3y-z+6=0\r\n" );
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document.write( "Get the constants on the right:\r\n" );
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document.write( "3x-4y+2z=-8, x+5y-3z=-2, 5x+3y-z=-6\r\n" );
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document.write( "I'll color the constants red:\r\n" );
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document.write( "x is the FIRST unknown and so  is just like \r\n" );
document.write( "except that the FIRST column is replaced by the three red numbers: \r\n" );
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document.write( "y is the SECOND unknown and so  is just like \r\n" );
document.write( "except that the SECOND column is replaced by the three red numbers: \r\n" );
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document.write( "z is the THIRD unknown and so  is just like \r\n" );
document.write( "except that the THIRD column is replaced by the three red numbers,\r\n" );
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document.write( "Do you know how to evaluate a 3x3 determinant?\r\n" );
document.write( "If not, post again asking how to.  I will assume\r\n" );
document.write( "you already know how.\r\n" );
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document.write( "Then the solutions are:\r\n" );
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document.write( "Edwin

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