Solve the System $$\begin{array} { l } x - y + z = 1 \\x + y + z = 3 \\x + y - z = - 3\end{array}$$

question 70

Multiple Choice

Solve the system.
- $$\begin{array} { l } x - y + z = 1 \\x + y + z = 3 \\x + y - z = - 3\end{array}$$

• A) \(\{ ( 3 , - 1,1 ) \}\)
• B) \(\varnothing\)
• C) \(\{ ( - 1,1,3 ) \}\)
• D) \(\{ ( - 1,3,1 ) \}\)

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