Solve by Using the Substitution Method $$\begin{array} { l } x - y = 9 \\4 x + 5 y = - 18\end{array}$$

Solve by using the substitution method. $$\begin{array} { l } x - y = 9 \\4 x + 5 y = - 18\end{array}$$

A) (1, -8)
B) (2, -7)
C) (5, -4)
D) (3, -6)