hello can someone please demonstrate how matrix is evaluated by expressing it in echelon form and use row reduction to solve it. it would be a great help.

k1+ L2+ Z = 20

3K -L+2Z = 22

2K+L-4Z=7

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- April 15th 2010, 11:35 PMsigma1matrix equation.
hello can someone please demonstrate how matrix is evaluated by expressing it in echelon form and use row reduction to solve it. it would be a great help.

k1+ L2+ Z = 20

3K -L+2Z = 22

2K+L-4Z=7 - April 16th 2010, 04:09 AMHallsofIvy
Actually, it is the other way around- row reduce in order to get the echelon form.

The "augmented matrix" for this system is .

Now use row operations to put this into echelon form. For example, a first step would be to subtract three times the first row from the second row and subtract two times the first row from the third row:

That take care of the first row. Now subtract 3/7 times the second row from the third row. - April 16th 2010, 09:09 AMsigma1
- April 16th 2010, 09:35 AMharish21
You might want to use this to find out where you are going wrong:

Linear Algebra Toolkit - April 16th 2010, 09:40 AMsigma1