Use Back-Substitution to Solve the System of Linear Equations $$\left\{ \begin{array} { c l } 2 x - y + 5 z & = 24 \\y + 2 z & = 9 \\z & = 7\end{array} \right.$$

question 35

Multiple Choice

Use back-substitution to solve the system of linear equations. ?? $$\left\{ \begin{array} { c l } 2 x - y + 5 z & = 24 \\y + 2 z & = 9 \\z & = 7\end{array} \right.$$ ?

• A)? \[( - 8 , - 5,7 )\]
• B)?? \[( - 8,5,7 )\]
• C)?? \(( - 8 , - 5 , - 7 )\)
• D)?? \(( - 7 , - 5,7 )\)
• E)?? \(( - 8 , - 5 , - 5 )\)

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