Write the system of equations as an augmented matrix

{3x+6y3z=62x+y5z=45x3yz=5\displaystyle {\left\lbrace\begin{array}{c} {3}{x}+{6}{y}-{3}{z}=-{6}\\{2}{x}+{y}-{5}{z}={4}\\-{5}{x}-{3}{y}-{z}={5}\end{array}\right.}