Use Matrices and Gaussian Elimination to Solve Systems
- $$\begin{aligned}x - y + 4 z & = 15 \\2 x + z & = 3 \\x + 2 y + z & = - 3\end{aligned}$$

Multiple Choice

Use Matrices and Gaussian Elimination to Solve Systems
- $$\begin{aligned}x - y + 4 z & = 15 \\2 x + z & = 3 \\x + 2 y + z & = - 3\end{aligned}$$

A) $\{ ( 0 , - 3,3 ) \}$
B) $\{ ( 0,3 , - 3 ) \}$
C) $\{ ( 3 , - 3,0 ) \}$
D) $\{ ( 3,0 , - 3 ) \}$