Solve the System by Substitution $$\begin{array} { l } x + y = - 12 \\x - y = 2\end{array}$$

question 478

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { l } x + y = - 12 \\x - y = 2\end{array}$$

• A) \(\varnothing\)
• B) \(\{ ( - 5 , - 7 ) \}\)
• C) \(\{ ( - 6 , - 6 ) \}\)
• D) \(\{ ( 5 , - 6 ) \}\)

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