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## Homework Statement

Here is the problem:

http://img801.imageshack.us/img801/6770/oaza.png [Broken]

## Homework Equations

None really, just gauss jordon elimination I assume unless I am missing out on something

## The Attempt at a Solution

First I multiplied the first row by -5 then added it to the second row to obtain the following:

1 1 5 3

0 -1 -27 -8

and then multiplied the second row by 1 and added the result to the first row to obtain:

1 0 -22 -5

0 -1 -27 -8

I then tried to solve inputting the numbers into the boxes but apparently I can't put letters or x1 x2 x3 etc.. meaning that the solution is just numbers ie: 1 + 2 is the solution, which is not what I got. My question is, and I am having a little trouble wondering what they want is why do they have 2 separate columns? Am I supposed to transpose afterwards or did I make a mistake doing the elimination progress, I more or less want to know the steps more than anything as I have more questions like this one and have no idea how to go about them.

here are the other 2 :

http://img694.imageshack.us/img694/5315/m0a5.png [Broken]

http://img843.imageshack.us/img843/4208/2cu0.png [Broken]

thanks in advance!

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