Use Back-Substitution to Solve the System of Linear Equations $$\left\{ \begin{array} { c c } x - y + 2 z & = 22 \\3 y - 8 z & = - 9 \\z & = - 9\end{array} \right.$$

Use back-substitution to solve the system of linear equations.? $$\left\{ \begin{array} { c c } x - y + 2 z & = 22 \\3 y - 8 z & = - 9 \\z & = - 9\end{array} \right.$$ ?

A) ? $( - 13 , - 27 , - 9 )$
B) ? $( 13 , - 27 , - 9 )$
C) ? $( - 13,27 , - 9 )$
D) ? $( 13 , - 27,9 )$
E) ? $( 13,27 , - 9 )$

Correct Answer:

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