Use Matrices and Gauss-Jordan Elimination to Solve Systems
- $$\begin{array} { r } - 4 x + 7 y - z = 39 \\x + 6 y + 9 z = 62 \\- 5 x + y + z = - 1\end{array}$$

question 128

Multiple Choice

Use Matrices and Gauss-Jordan Elimination to Solve Systems
- $$\begin{array} { r } - 4 x + 7 y - z = 39 \\x + 6 y + 9 z = 62 \\- 5 x + y + z = - 1\end{array}$$

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

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