\begin{align*} x_1 + 2x_2 + 3x_3 &= 0\\ 2x_1 - x_2 + x_3 &= 2\\ x_1 - 8x_2 - 7x_3 &= 1\\ \quad x_2 + x_3 &= 0 \end{align*}
Solution