Solve the System by Using the Inverse of the Coefficient $$\begin{array} { c } 4 x + 4 y - z = 16 \\x - 8 y - 6 z = - 28 \\- 6 x + y + z = - 19\end{array}$$

question 418

Multiple Choice

Solve the system by using the inverse of the coefficient matrix.
- $$\begin{array} { c } 4 x + 4 y - z = 16 \\x - 8 y - 6 z = - 28 \\- 6 x + y + z = - 19\end{array}$$

• A) \(\varnothing\)
• B) \(\{ ( - 4,1,8 ) \}\)
• C) \(\{ ( 4,4,1 ) \}\)
• D) \(\{ ( 4,1,4 ) \}\)

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