Solve the System by the Addition Method $$\begin{array} { c } 2 \mathrm { x } + 10 \mathrm { y } = - 56 \\10 \mathrm { x } + 2 \mathrm { y } = 56\end{array}$$

Multiple Choice

Solve the system by the addition method.
- $$\begin{array} { c } 2 \mathrm { x } + 10 \mathrm { y } = - 56 \\10 \mathrm { x } + 2 \mathrm { y } = 56\end{array}$$

A) $\{ ( 7 , - 7 ) \}$
B) $\{ ( - 7,7 ) \}$
C) $\{ ( 10 , - 10 ) \}$
D) $\{ ( - 2,7 ) \}$