Use Matrices and Gauss-Jordan Elimination to Solve Systems
- $$\begin{aligned}- 3 x - y - 7 z & = - 76 \\3 x + 3 y - 6 z & = - 27 \\- 9 x - 2 y + z & = - 23\end{aligned}$$

question 6

Multiple Choice

Use Matrices and Gauss-Jordan Elimination to Solve Systems
- $$\begin{aligned}- 3 x - y - 7 z & = - 76 \\3 x + 3 y - 6 z & = - 27 \\- 9 x - 2 y + z & = - 23\end{aligned}$$

• A) \(\{ ( 2,7,9 ) \}\)
• B) \(\{ ( 2,9,7 ) \}\)
• C) \(\{ ( - 2,7,4 ) \}\)
• D) \(\{ ( 4,7 , - 2 ) \}\)

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