Solve the System of Equations by Using an Inverse Matrix $$\begin{aligned}8 x - 9 y - z & = - 12 \\x + 2 y + 7 z & = 64 \\- 7 x + y + z & = - 23\end{aligned}$$

question 316

Multiple Choice

Solve the system of equations by using an inverse matrix.
- $$\begin{aligned}8 x - 9 y - z & = - 12 \\x + 2 y + 7 z & = 64 \\- 7 x + y + z & = - 23\end{aligned}$$

• A) \(( - 5,5,10 )\)
• B) \(( 5,7,5 )\)
• C) \(( 5,5,7 )\)
• D) \(\varnothing\)

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