Solve the System by the Addition Method $$\left\{ \begin{array} { l } 9 x + 5 y = 51 \\7 x - 2 y = 75\end{array} \right.$$

Multiple Choice

Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set
notation to express the solution set.
- $$\left\{ \begin{array} { l } 9 x + 5 y = 51 \\7 x - 2 y = 75\end{array} \right.$$

A) no solution; $\varnothing$
B) $\{ ( 9 , - 6 ) \}$
C) $\{ ( 9 , - 5 ) \}$
D) $\{ ( 8 , - 5 ) \}$