Write the System of Linear Equations Represented by the Augmented $$\left[ \begin{array} { r r r r | r } 6 & 1 & 0 & 8 & - 6 \\- 1 & 3 & 1 & 0 & 7 \\7 & 0 & 0 & 5 & - 4 \\0 & 4 & 0 & - 4 & 10\end{array} \right]$$

Multiple Choice

Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the
variables.
- $$\left[ \begin{array} { r r r r | r } 6 & 1 & 0 & 8 & - 6 \\- 1 & 3 & 1 & 0 & 7 \\7 & 0 & 0 & 5 & - 4 \\0 & 4 & 0 & - 4 & 10\end{array} \right]$$

A)
$$\begin{array} { r } 6 x + y + 8 w = - 6 \\- x + 3 y + z = 7 \\7 x + 5 w = - 4 \\4 y - 4 w = 10\end{array}$$
B)
$6 x + y + z + 8 w = - 6$
$- x + 3 y + z + w = 7$
$7 x + y + z + 5 w = - 4$
C)
$\begin{array}{r}6 x+y+8 w=-6 \\x+3 y+z=7 \\7 x+5 w=-4 \\4 y+4 w=10\end{array}$


D)
$\begin{array}{r}6 x+y+8 z=-6 \\-x+3 y+z=7 \\7 x+5 y=-4 \\4 x-4 y=10\end{array}$