Calculate$| \mathbf { A } |$ -$$\begin{aligned}
9 x - 9 y - z & = - 30 \
x - 5 y - 6 z & = - 41 \
- 8 x + y + z & = - 8
\end{aligned}$$

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The Answer of Calculate$| \mathbf { A } |$ -$$\begin{aligned}
9 x - 9 y - z & = - 30 \
x - 5 y - 6 z & = - 41 \
- 8 x + y + z & = - 8
\end{aligned}$$

Calculate $| \mathbf { A } |$ - $\begin{aligned}9 x - 9 y - z & = - 30 \\x - 5 y - 6 z & = - 41 \\- 8 x + y + z & = - 8\end{aligned}$