Solve the System Using the Inverse That Is Given for the Coefficient

Multiple Choice

Solve the system using the inverse that is given for the coefficient matrix.
- $x + 2 y + 3 z = 7$ $x + y + z = 6$ $x - 2 z = - 6$ The inverse of $\left[ \begin{array} { r r r } 1 & 2 & 3 \\ 1 & 1 & 1 \\ 1 & 0 & - 2 \end{array} \right]$ is $\left[ \begin{array} { r r r } - 2 & 4 & - 1 \\ 3 & - 5 & 2 \\ - 1 & 2 & - 1 \end{array} \right]$ .

A) $\{ ( 16 , - 21,11 ) \}$
B) $\{ ( 10 , - 14,11 ) \}$
C) $\{ ( 7,0,0 ) \}$
D) $\{ ( 32,39,13 ) \}$