Solve the System by the Addition Method $$\begin{array} { l } 7 x + 9 y = 128 \\3 x - 9 y = - 48\end{array}$$

Multiple Choice

Solve the system by the addition method. $$\begin{array} { l } 7 x + 9 y = 128 \\3 x - 9 y = - 48\end{array}$$

A) $( - 1,15 )$
B) $( 17,1 )$
C) $( 8,8 )$
D) $( 17,11 )$