SOLUTION: Could you please show me how to do matrix for these equations? I don't understand how it works. 7x+8y-z=9 x-2y-5z=-31 -7x+y+z=0 Thank you so very much for your time and

Algebra ->  Algebra  -> Matrices-and-determiminant -> SOLUTION: Could you please show me how to do matrix for these equations? I don't understand how it works. 7x+8y-z=9 x-2y-5z=-31 -7x+y+z=0 Thank you so very much for your time and       Log On

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Question 172106: Could you please show me how to do matrix for these equations? I don't understand how it works.
7x+8y-z=9
x-2y-5z=-31
-7x+y+z=0

Thank you so very much for your time and help!
I really appreciate it!

Answer by Alan3354(21608) About Me  (Show Source):
You can put this solution on YOUR website!
Could you please show me how to do matrix for these equations? I don't understand how it works.
7x+8y-z=9
x-2y-5z=-31
-7x+y+z=0
-------------------
I can do that, but it's tedious to do on this site.
If you email me at gsihoutx@aol.com, I can scan and email you some hand-written notes, and an Excel sheet that I made that will solve 3x3 and 4x4 matrices.