Write the System of Equations Associated with the Augmented Matrix $$\left[ \begin{array} { l l l | l } 1 & 0 & 0 & 7 \\0 & 1 & 0 & 1 \\0 & 0 & 1 & 5\end{array} \right]$$

Multiple Choice

Write the system of equations associated with the augmented matrix. Do not solve.
- $$\left[ \begin{array} { l l l | l } 1 & 0 & 0 & 7 \\0 & 1 & 0 & 1 \\0 & 0 & 1 & 5\end{array} \right]$$

A) $x = - 7$
$y = - 1$
$z = - 5$

B) $x = 0$
$y = 8$
$\mathrm { z } = 12$

C) $x = 7$
$y = 1$
$z = 5$

D) $x = 2$
$y = - 4$
$z = 0$