Question

how do I solve a system of equations with an augmented matrix?

Answer 1

row reduce the matrix, the last column will be your solution

Answer 2

but how do you get the first rows to equal the identity. it seems kind of random.

Answer 3

Here is a video that might help
http://www.khanacademy.org/math/linear-algebra/v/solving-3-equations-with-3-unknowns

Answer 4

use cramer rule

Answer 5

@myko the point is that I have to use augmented matrices.