Solve the System by the Addition Method $$\begin{array} { l } - 12 x - 15 y = - 27 \\- 0.4 x = 6.8 + 0.5 y\end{array}$$

Multiple Choice

Solve the system by the addition method. $$\begin{array} { l } - 12 x - 15 y = - 27 \\- 0.4 x = 6.8 + 0.5 y\end{array}$$

A) $( - 24,21 )$
B) $( - 9,9 )$
C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = - \frac { 4 } { 5 } x + \frac { 9 } { 5 } \right\}$ ; dependent system
D) No solution; { } ; inconsistent system