Use the Elimination-By-Addition Method to Solve the System $$\left( \begin{array} { c } 4 x + 6 y = - 8 \\8 x - 6 y = 92\end{array} \right)$$

Use the elimination-by-addition method to solve the system. $$\left( \begin{array} { c } 4 x + 6 y = - 8 \\8 x - 6 y = 92\end{array} \right)$$