(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img.rflz.net/problems.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

Question 1

x_{4}= 1 + 4x_{5}

but from there I am not sure where to go or if there is even a solution?

Question 2

I eventually got the matrix down to this:

but again I am not sure if that is enough? I don't understand how back substitution is possible.Code (Text):1 2 -3 1 4 1

0 1 1 0 1 1

0 0 1 0 -1/3 -1/3

0 0 0 1 -1/3 4/3

Question 3

Similar to 3. I sort of got it to row-echelon, but am having trouble. Any help on the previous question should help here.

Thanks

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# Homework Help: Solving linear systems + gaussian elimination

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