Answer
x= $\begin{bmatrix}2\\-5\\\end{bmatrix}$
Work Step by Step
x=$A^{-1}b$
$A^{-1}$= $\begin{bmatrix}1&1\\-1.4&-1.6\\\end{bmatrix}$
$\begin{bmatrix}x_{1}\\x_{2}\\\end{bmatrix}$= $\begin{bmatrix}1&1\\-1.4&-1.6\\\end{bmatrix}$ $\begin{bmatrix}-9\\11\\\end{bmatrix}$
=$\begin{bmatrix}-9+11\\-1.4(-9)+(-1.6)(11)\\\end{bmatrix}$
=$\begin{bmatrix}2\\-5\\\end{bmatrix}$
