Solve the System by the Substitution Method $$\begin{array} { l } x ^ { 2 } = y ^ { 2 } + 39 \\x - y = 3\end{array}$$

Multiple Choice

Solve the system by the substitution method.
- $$\begin{array} { l } x ^ { 2 } = y ^ { 2 } + 39 \\x - y = 3\end{array}$$

A) $\{ ( - 8,5 ) \}$
B) $\{ ( - 8 , - 5 ) \}$
C) $\{ ( 8,5 ) \}$
D) $\{ ( 8 , - 5 ) \}$