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Use Back-Substitution to Solve the System of Linear Equations {x−y+2z=223y−8z=−9z=−9\left\{ \begin{array} { c c } x - y + 2 z & = 22 \\3 y - 8 z & = - 9 \\z & = - 9\end{array} \right.

Question 25

Multiple Choice

Use back-substitution to solve the system of linear equations.? {x−y+2z=223y−8z=−9z=−9\left\{ \begin{array} { c c } x - y + 2 z & = 22 \\3 y - 8 z & = - 9 \\z & = - 9\end{array} \right. ?


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

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