I am entering precalculus but in order to finish the summer packet, I have to go all the way back to algebra. I need some refreshing on system of equations.

If you could explain how to do these problems and give me a summary of how to do the different methods, it would be extremely helpful.

These are the specific questions I am having trouble with, if you explain how to do them it would be a big help. Thanks.

1) 5x+4y=6 -2x-3y=-1

2) -2x+y=8 y=-3x-2

Any help would be appreciated, thanks in advance.