Representing Linear Systems with Matrices Practice Test

$$\begin{bmatrix}1 & 2\\ 3 & -1\end{bmatrix}\begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}3\\ 8\end{bmatrix}$$

$$\begin{bmatrix}1 & 3\\ 2 & -1\end{bmatrix}\begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}-3\\ 8\end{bmatrix}$$

$$\begin{bmatrix}1 & 2\\ 3 & 1\end{bmatrix}\begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}-3\\ 8\end{bmatrix}$$

$$\begin{bmatrix}1 & 2\\ 3 & -1\end{bmatrix}\begin{bmatrix}x\\ y\end{bmatrix}=\begin{bmatrix}-3\\ 8\end{bmatrix}$$