Use Matrices to Solve the System of Equations $\left\{ \begin{array} { l } 2 x + 2 y = 6 \\- x - y = - 3\end{array} \right.$

Essay

Use matrices to solve the system of equations. If the equations of the system are dependent, or if the system is inconsistent, so indicate. $\left\{ \begin{array} { l } 2 x + 2 y = 6 \\- x - y = - 3\end{array} \right.$