Sorry, I don't really remember it, but it's easy once you know what you are doing; just time consuming.

Post edited at 3:32 pm on Nov. 6, 2009 by Googoie

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Offering all of my reward points for someone to get me to Patron.
Must keep those black wings folded, until the time is right...

The best thing I can offer you is to do the steps slowly.  Don't try to skip any steps, write all things out carefully.  As you practice more with it, you'll be able to do the problems using it more quickly.

In general, just make sure everything matches up.  x1 should correlate to removing the 1st column of a and replacing with be.  Then x2 with 2nd column, etc, etc.  If you do it carefully, you should be able to get the answer.

If you have trouble finding determinants, then that's another thing that you should look in to.  Feel free to ask if you need help finding the determinant of a matrix.