Hello,

I've been trying to find the inverse of the following matrix for some time now:

1 0 2

2 -1 3

4 1 8

I can easily find the answer on my calculator, but I have no idea how to find the inverse! I performed a basic Gauss-Jordan, and got an identity matrix as a result; the answer is really:

-11 2 2

-4 0 1

6 -1 -1

Thanks in advance!