Solve the System by Using the Inverse of the Coefficient $$\begin{array} { r } - 3 x - 3 y - z = - 46 \\x - 9 y + 5 z = - 46 \\- 4 x + y + z = - 12\end{array}$$

question 114

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{array} { r } - 3 x - 3 y - z = - 46 \\x - 9 y + 5 z = - 46 \\- 4 x + y + z = - 12\end{array}$$

• A) \(\{ ( - 6,8,12 ) \}\)
• B) \(\varnothing\)
• C) \(\{ ( 6,8,4 ) \}\)
• D) \(\{ ( 6,4,8 ) \}\)

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