Solve the System of Equations Using the Addition Method $$\begin{array} { l } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array}$$

question 66

Multiple Choice

Solve the system of equations using the addition method.
- $$\begin{array} { l } 7 x + 7 y + z = 1 \\x + 8 y + 8 z = 8 \\9 x + y + 9 z = 9\end{array}$$

• A)(0, 0, 1)
• B)(-1, 1, 1)
• C)(1, -1, 1)
• D)(0, 1, 0)

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