document.write( "Question 136905: I have tried every solution and I cannot come up with an answer to this problem.
\n" ); document.write( "I am trying to solve the problem by Crammer's Rule using determinants. The problem is: 3x - 2y+ z = 6
\n" ); document.write( " 4x -4y + 3z = 0
\n" ); document.write( " 5x - 4y + z = -5\r
\n" ); document.write( "\n" ); document.write( "I would very much appreciate your help,I have spent hours trying to find solutions to this problem. Thank-you.
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Algebra.Com's Answer #100198 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
Step 1: Create the coefficient determinant and the answer column matrix\r
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\n" ); document.write( "\n" ); document.write( "\"D=%28matrix%283%2C3%2C3%2C-2%2C1%2C4%2C-4%2C3%2C5%2C-4%2C1%29%29\"
\n" ); document.write( "\"AC=%28matrix%283%2C1%2C6%2C0%2C-5%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Step 2: Evaluate the determinant.\r
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\n" ); document.write( "\n" ); document.write( "Step 3: Now, take the coefficient determinant and replace the x-column (the first column) with the answer column, like this:\r
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\n" ); document.write( "\n" ); document.write( "\"D%5Bx%5D=%28matrix%283%2C3%2C6%2C-2%2C1%2C0%2C-4%2C3%2C-5%2C-4%2C1%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Step 4: Evaluate the \"D%5Bx%5D\" determinant as shown in step 2.\r
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\n" ); document.write( "\n" ); document.write( "Cramer's rule states that \"x=D%5Bx%5D%2FD\"\r
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\n" ); document.write( "\n" ); document.write( "Step 5: Repeat step 3 and 4, except replace the y-column (the second column) with the answer column matrix and apply Cramer's rule: \"y=D%5By%5D%2FD\"\r
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\n" ); document.write( "\n" ); document.write( "Step 6: Do it one more time replacing the z-column (the third column) with the answer column. \"z=D%5Bz%5D%2FD\"\r
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\n" ); document.write( "\n" ); document.write( "Hint: Be extremely meticulous about the signs on the numbers when evaluating the determinants. If you have access to Microsoft Excel, you can put the coefficients into a square set of cells, one coefficient per cell. Let's say you put them in cells A1 through C3, then in an empty cell, type in =MDETERM(A1:C3). When you hit enter, the value of the determinant will appear.
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