Answer
$\left[\begin{array}{llll}
3 & 1 & -1 & 2\\
2 & -1 & 0 & 1\\
1 & 0 & -1 & 3
\end{array}\right]$
Work Step by Step
The augmented matrix of a system of linear equations is the matrix consisting of the coefficients
and in the last column, the constant terms.
$\left[\begin{array}{llll}
3 & 1 & -1 & 2\\
2 & -1 & 0 & 1\\
1 & 0 & -1 & 3
\end{array}\right]$