Use Gaussian elimination to solve x+2y-z=-3, 2x-4y+z=-7, -2x+2y-3z=4

[the305itself]

Hello. I have attached an image to this thread. I am looking for an explanation for the right answer. I cannot seem to create the Gaussian elimination. Any help would be appreciated. Thanks.

 

[mmm4444bot]

… I am looking for an explanation for the right answer. I cannot seem to create the Gaussian elimination. Any help would be appreciated.

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[stapel]

Use Gaussian elimination to solve the following system of equations.

. . . . .\(\displaystyle \left\{\begin{align}\hphantom{-2}x\, +\, 2y\, -\,\hphantom{3}z\, &=\, -3\\ \hphantom{-}2x\, -\, 4y\, +\, \hphantom{3}z\, &=\, -7\\-2x\, +\, 2y\, -\, 3z\, &=\, \hphantom{-}4\end{align}\right.\)

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I am looking for an explanation for the right answer.

There are loads of great online explanations of how to arrive at "the right answer"! Try here.

I cannot seem to create the Gaussian elimination.

I'm sorry, but I don't understand what you mean by not being able to "create" the elimination...? Please reply showing what you've tried so far, as this will be very helpful to us in understanding what's going on. Thank you!