document.write( "Question 1069415: cramer rule
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Algebra.Com's Answer #684641 by Edwin McCravy(20060) $\"\"$ $\"About$

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x+2y+2z=2
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document.write( "Write in all the 1 coefficients, as well as +0y\r\n" );
document.write( "in the third equation for the missing term in y:\r\n" );
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document.write( "Cramer's rule:\r\n" );
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document.write( "There are 4 columns,\r\n" );
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document.write( "1. The column of x-coefficients \r\n" );
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document.write( "2. The column of y-coefficients \r\n" );
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document.write( "3. The column of z-coefficients  \r\n" );
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document.write( "4. The column of constants:     \r\n" );
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document.write( "There are four determinants:\r\n" );
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document.write( "1. The determinant  consists of just the three columns\r\n" );
document.write( "of x, y, and z coefficients. in that order, but does not\r\n" );
document.write( "contain the column of constants.\r\n" );
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document.write( ". \r\n" );
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document.write( "It has value .  I'm assuming you know how to find the\r\n" );
document.write( "value of a 3x3 determinant, for that's a subject all by itself.\r\n" );
document.write( "If you don't know how, ask me for help in the thank-you note\r\n" );
document.write( "form below. \r\n" );
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document.write( "2. The determinant  is like the determinant \r\n" );
document.write( "except that the column of x-coefficients is replaced by the\r\n" );
document.write( "column of constants.   does not contain the column \r\n" );
document.write( "of x-coefficients.\r\n" );
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document.write( ".\r\n" );
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document.write( "It has value .\r\n" );
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document.write( "3. The determinant  is like the determinant \r\n" );
document.write( "except that the column of y-coefficients is replaced by the\r\n" );
document.write( "column of constants.   does not contain the column \r\n" );
document.write( "of y-coefficients.\r\n" );
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document.write( ".\r\n" );
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document.write( "It has value .\r\n" );
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document.write( "4. The determinant  is like the determinant \r\n" );
document.write( "except that the column of z-coefficients is replaced by the\r\n" );
document.write( "column of constants.   does not contain the column \r\n" );
document.write( "of z-coefficients.\r\n" );
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document.write( ".\r\n" );
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document.write( "It has value .\r\n" );
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document.write( "Now the formulas for x, y and z are\r\n" );
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document.write( "Solution =  = \r\n" );
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document.write( "Edwin

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