Simplify Complex Rational Expressions
- $$\begin{array} { l } 2 x + 6 y + 9 z = 66 \\7 x + 6 y + 8 z = 77 \\9 x + 8 y - 2 z = 51\end{array}$$

Multiple Choice

Simplify Complex Rational Expressions
- $$\begin{array} { l } 2 x + 6 y + 9 z = 66 \\7 x + 6 y + 8 z = 77 \\9 x + 8 y - 2 z = 51\end{array}$$

A)
$\left[ \begin{array} { r r r | r } 2 & 6 & 9 & 66 \\ 7 & 6 & 8 & 77 \\ 9 & 8 & - 2 & 51 \end{array} \right]$

B)

$\left[ \begin{array} { r r r | r } 2 & 7 & 9 & 66 \\ 6 & 6 & 8 & 77 \\ 9 & 8 & - 2 & 51 \end{array} \right]$
C)
$\left[\begin{array}{rrr|r}66 & 9 & 6 & 2 \\77 & 8 & 6 & 7 \\51 & -2 & 8 & 9\end{array}\right]$

D)
$\left[\begin{array}{rrr}2 & 6 & 9 \\7 & 6 & 8 \\9 & 8 & -2\end{array}\right]$