Solve the System by Elimination $$\begin{array} { l } - 7 x - 6 y = - 13 \\- 3 x + 3 y = - 39\end{array}$$

Multiple Choice

Solve the system by elimination.
- $$\begin{array} { l } - 7 x - 6 y = - 13 \\- 3 x + 3 y = - 39\end{array}$$

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