Solve Linear Systems by Addition
- $$\begin{array} { l } 2 x + 15 y = - 91 \\9 x + 3 y = 42\end{array}$$

Multiple Choice

Solve Linear Systems by Addition
- $$\begin{array} { l } 2 x + 15 y = - 91 \\9 x + 3 y = 42\end{array}$$

A) $\{ ( 7 , - 7 ) \}$
B) $\{ ( - 7,7 ) \}$
C) $\{ ( 9 , - 9 ) \}$
D) $\{ ( - 3,7 ) \}$