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

question 60

Multiple Choice

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

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

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