Use Cramer S Rule to Solve the System of Equations $\left\{ \begin{array} { l } x + y = 8 \\x - y = 4\end{array} \right.$

Short Answer

Use Cramer s rule to solve the system of equations, if possible. If the equations of the system are dependent, or if the system is inconsistent, so indicate. $\left\{ \begin{array} { l } x + y = 8 \\x - y = 4\end{array} \right.$