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

question 7

Multiple Choice

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) \(( 13,27 , - 9 )\)

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