Find the Inverse Matrix of A $\mathrm { A } ^ { - 1 } = \left[ \begin{array} { r r } 3 & - 7 \\ - 2 & 5 \end{array} \right]$

Multiple Choice

Find the inverse matrix of A.
-If $\mathrm { A } ^ { - 1 } = \left[ \begin{array} { r r } 3 & - 7 \\ - 2 & 5 \end{array} \right]$ , solve $\mathrm { AX } = \left[ \begin{array} { l } 5 \\ 10 \end{array} \right]$ for $\mathrm { X }$ .

A) $X = \left[ \begin{array} { l } - 110 \\ - 120 \end{array} \right]$
B) $X = \left[ \begin{array} { l } - 55 \\ 40 \end{array} \right]$
C) $X = \left[ \begin{array} { l } 55 \\ - 60 \end{array} \right]$
D) $X = \left[ \begin{array} { l } - 20 \\ 60 \end{array} \right]$