$\left\{ \begin{aligned}4 x - y + 3 z & = 12 \\2 x + 9 z & = - 5 \\x + 4 y + 6 z & = - 32\end{aligned} \right.$

Multiple Choice

$\left\{ \begin{aligned}4 x - y + 3 z & = 12 \\2 x + 9 z & = - 5 \\x + 4 y + 6 z & = - 32\end{aligned} \right.$

A) x=2, y=7, z=-1
B) x=2, y=-7, z=1
C) x=2, y=7, z=1
D) x=2, y=-7, z=-1