Use the Gauss-Jordan Method to Solve the System of Equations $$\begin{array} { c } - 4 x - 7 y - z = - 67 \\x + 6 y - 2 z = 20 \\9 x + y + z = 67\end{array}$$

question 151

Multiple Choice

Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last
variable be the arbitrary variable.
- $$\begin{array} { c } - 4 x - 7 y - z = - 67 \\x + 6 y - 2 z = 20 \\9 x + y + z = 67\end{array}$$

• A) \(\varnothing\)
• B) \(\{ ( 6,5,8 ) \}\)
• C) \(\{ ( - 6,5,12 ) \}\)
• D) \(\{ ( 6,8,5 ) \}\)

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