- #1

- 8

- 0

## Homework Statement

The matrix is in the following form

2 4 -2 -2

1 3 1 2

1 3 1 3

-1 2 1 2

## Homework Equations

## The Attempt at a Solution

I subtracted equation 2 from equation 3 and came up with the following matrix

2 4 -2 -1

1 3 1 2

0 0 0 1

1 -2 1 2

It seems to make sense to pivot around the 1 in the third equation. I tried it and got 5 which I know is not that answer using an online Matrix calculator and my professor.