Solve the System by Using the Inverse of the Coefficient $$\begin{array} { l } - 3 x - y - 6 z = - 54 \\9 x + 4 y - 7 z = 65 \\2 x - 9 y + z = - 5\end{array}$$

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{array} { l } - 3 x - y - 6 z = - 54 \\9 x + 4 y - 7 z = 65 \\2 x - 9 y + z = - 5\end{array}$$

A) $\{ ( - 9,3,18 ) \}$
B) $\varnothing$
C) $\{ ( 9,3,4 ) \}$
D) $\{ ( 9,4,3 ) \}$