Grand Valley State University

We don’t have your requested question, but here is a suggested video that might help.

The augmented matrix for the system
$$
\left\{\begin{aligned}
x-3 y=5 &\left[\begin{array}{rr|r}
1 & -3 & 5 \\
y-2 z & =7 & \text { is } & 1 & -2 & 7 \\
2 x+z & =4 & & 2 & 1 & 4
\end{array}\right]
\end{aligned}\right.
$$