Solve the System by the Substitution Method $$\begin{array} { l } x y = 56 \\x + y = - 15\end{array}$$

question 131

Multiple Choice

Solve the system by the substitution method.
- $$\begin{array} { l } x y = 56 \\x + y = - 15\end{array}$$

• A) \(\{ ( - 7 , - 8 ) , ( - 8 , - 7 ) \}\)
• B) \(\{ ( 7 , - 8 ) , ( 8 , - 7 ) \}\)
• C) \(\{ ( - 7,8 ) , ( - 8,7 ) \}\)
• D) \(\{ ( 7,8 ) , ( 8,7 ) \}\)

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