Simplify Complex Rational Expressions
- $$\begin{array} { r } x - 4 y + z = 15 \\y + 8 z = 11 \\z = 14\end{array}$$

Multiple Choice

Simplify Complex Rational Expressions
- $$\begin{array} { r } x - 4 y + z = 15 \\y + 8 z = 11 \\z = 14\end{array}$$

A)
$\left[ \begin{array} { c c c | c } 1 & - 4 & 1 & 15 \\ 0 & 1 & 8 & 11 \\ 0 & 0 & 1 & 14 \end{array} \right]$
B)

$\left[ \begin{array} { c c | c | c } 0 & - 4 & 0 & 15 \\ 0 & 0 & 8 & 11 \\ 0 & 0 & 0 & 14 \end{array} \right]$
C)
$$\left[ \begin{array} { l l l | l } 1 & 4 & 1 & 15 \\0 & 1 & 8 & 11 \\0 & 0 & 1 & 14\end{array} \right] \quadD) \left[ \begin{array} { r r r | r } 1 & - 4 & 1 & 15 \\1 & 1 & 8 & 11 \\1 & 1 & 14\end{array} \right]$$