Use an Inverse Matrix to Find the Solution to the System

question 5

Multiple Choice

Use an inverse matrix to find the solution to the system.
- $$\left\{ \begin{array} { c } 3 x - y - 5 z = - 34 \\- 3 x + 4 y + 3 z = 37 \\9 x - 6 y + z = 21\end{array} \right.$$

• A) \(x = 6 , y = 9 , z = 7\)
• B) \(x = - 6 , y = 7 , z = 12\)
• C) \(x = 6 , y = 7 , z = 9\)
• D) \(x = - 6 , y = 12 , z = 7\)

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