Solve the System by the Substitution Method $$\left\{ \begin{array} { r } 5 x - 2 y = - 1 \\x + 4 y = 35\end{array} \right.$$

Multiple Choice

Solve the system by the substitution method.
- $$\left\{ \begin{array} { r } 5 x - 2 y = - 1 \\x + 4 y = 35\end{array} \right.$$

A) $\{ ( 3,8 ) \}$
B) $\{ ( 3,9 ) \}$
C) $\{ ( x , y ) \mid x + 4 y = 35 \}$
D) $\varnothing$