Give a Step-By-Step Description of How You Would Solve the System

Short Answer

Give a step-by-step description of how you would solve the system. $$\left( \begin{array} { c } 2 x - y + 3 z = 10 \\x - 2 y - z = 4 \\3 x + 5 y + 8 z = 12\end{array} \right)$$