Solve the System $$\left( \begin{array} { l } 5 x - 6 y + 3 z = 17 \\5 x + 6 y - 4 z = 26 \\4 x - 2 y + 2 z = 12\end{array} \right)$$

Solve the system. $$\left( \begin{array} { l } 5 x - 6 y + 3 z = 17 \\5 x + 6 y - 4 z = 26 \\4 x - 2 y + 2 z = 12\end{array} \right)$$