First, we can write the system of equations as an augmented matrix:
$\begin{bmatrix} -1 & 0 & 1 & 0 \\ 2 & 3 & 0 & 3 \\ 0 & 1 & -1 & 4 \end{bmatrix}$
Now, we can separate the augmented matrix into a coefficient matrix A, a variable matrix X, and a constant matrix
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