Solve the System by Substitution $$\begin{array} { l } x + y = - 6 \\x - y = - 4\end{array}$$

question 214

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { l } x + y = - 6 \\x - y = - 4\end{array}$$

• A) \(\{ ( - 5 , - 1 ) \}\)
• B) \(\varnothing\)
• C) \(\{ ( 5,0 ) \}\)
• D) \(\{ ( - 6,0 ) \}\)

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