Hey. Just so you know, this really shouldn't be in the advanced algebra section. Anyways, I don't have any videos, but I suppose that making some would be a good idea, allthough I don't really have the time. Regardless, there's an oranization called Kahn Academy that you might want to check out. He probally has videos on this sort of thing on his website, and these videos are free as Kahn Academy is a nonprofit. Anyways, here's a quick run down of the sorts of things you do would need to check out above.
1. Solve equations "Y" I'm assuming by this you mean that you have a system of linear equations. In this case, then what you do is the following. Bring any constant terms in any equantion to one side. Call the variables . Then, make sure that you have 0s for the xs that don't appear in the