Question

# The given matrix is the augmented matrix for a system of linear equations \begin{bmatrix}1&0&-1&0&-1&-2&0 \\0&1&2&0&1&2&0\\0&0&0&1&1&1&0 \end{bmatrix}

Forms of linear equations
The given matrix is the augmented matrix for a system of linear equations $$\Bigg[ \begin{array}{} 1&0&-1&0&-1&-2&0\\ 0&1&2&0&1&2&0 \\ 0&0&0&1&1&1&0\\ \end{array} \Bigg]$$