Solve the System by Using the Inverse of the Coefficient $5 x-6 y-6 z=-68$

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $5 x-6 y-6 z=-68$
$-2 x+3 y+2 z=29$
$-9 x-3 y+9 z=-18$

A) $(9,9,9)$
B) $(8,9,9)$
C) $(9,7,9)$
D) $(8,-9,-9)$