Yep. Just as I predicted. Posting tons of nearly-identical questions, instead of learning the method from one answer so that you can do the rest. So here's an identical answer for you.
This page shows you all the different ways of solving sets of linear equations. Not that you'll actually read it:
http://mathforum.org/library/drmath/view/61608.html
And usual, you probably won't give out a "best answer" to anybody, since glancing at your past questions it seems that you never do.