Use Back-Substitution to Solve the System of Linear Equations $$\left\{ \begin{array} { c c c } - 3 x - 9 y - 7 z & = 0 \\4 y + 2 z & = - 8 \\z & = & 6\end{array} \right.$$

question 30

Multiple Choice

Use back-substitution to solve the system of linear equations.? $$\left\{ \begin{array} { c c c } - 3 x - 9 y - 7 z & = 0 \\4 y + 2 z & = - 8 \\z & = & 6\end{array} \right.$$

• A)? \(( 1,6 , - 5 )\)
• B)? \(( - 5,1,6 )\)
• C)? \(( 3 , - 5,6 )\)
• D)? \(( 1 , - 5,6 )\)
• E)? \(( 6 , - 5,1 )\)

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