I already know the 3 methods of doing it, but I recently found out about using matrices to solve it.

Question

How exactly do you do that? All I can remember is something with rref on my calculator.

Answer 1

http://en.wikipedia.org/wiki/Gaussian_elimination

Answer 2

Thanks, but that doesn't tell me about the rref thingy that I saw my teacher do.

Answer 3

I don't know about rref. You can use a calculator to compute the inverse of a matrix, do Gaussian elimination, or use Cramer's rule which uses determinants of matrices...

Answer 4

I googled rref and it says "reduced row echelon form"

Answer 5

http://math.la.asu.edu/~kolossa/119/calc.html

Answer 6

Thanks alot! This is going to help me solve these system of linear equations so much faster.