Solve the System Using Matrices $$\begin{array} { l } 5 x + 4 y = 32 \\- 9 x + 7 y = - 86\end{array}$$

Solve the system using matrices.
- $$\begin{array} { l } 5 x + 4 y = 32 \\- 9 x + 7 y = - 86\end{array}$$

A) (7, -1)
B) (8, -2)
C) (-8, -1)
D) inconsistent system