Solve the System by Substitution $$\begin{array} { r } x + 8 y = 35 \\2 x + 8 y = 30\end{array}$$

Multiple Choice

Solve the system by substitution.
- $$\begin{array} { r } x + 8 y = 35 \\2 x + 8 y = 30\end{array}$$

A) $\{ ( 5,4 ) \}$
B) $\{ ( - 4 , - 5 ) \}$
C) $\{ ( - 5,5 ) \}$
D) $\varnothing$