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August 5, 2015

Homework Help: Algebra

Posted by Amy on Saturday, March 24, 2012 at 5:22pm.

I dont quite understand how to solve matrices with three variables.

If I have the equations:
7x-4y-2z=0
2x-3y+z=-0.25
-2x-2y+5z=0

How can I solve this? I saw the explanation in a site but I didn't understand it. They appeared to make random operations until the matrix was:
1 0 0
0 1 0
0 0 1
I tried with the equations above but I got stuck no matter which order I had.

Please Help.

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