Solve the System by the Method of Substitution $\left\{ \begin{aligned}x - y & = 4 \\7 x - 4 y & = 37\end{aligned} \right.$

Multiple Choice

Solve the system by the method of substitution. $\left\{ \begin{aligned}x - y & = 4 \\7 x - 4 y & = 37\end{aligned} \right.$

A) (7, 3)
B) (7, -3)
C) (-8, -4)
D) (-7, 3)
E) (8, 4)