Solve the System of Equations Using Substitution $$\left\{ \begin{array} { c } x y = 72 \\x + y = 17\end{array} \right.$$

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { c } x y = 72 \\x + y = 17\end{array} \right.$$

A) $x = 9 , y = 8 ; x = 8 , y = 9$
B) $x = 9 , y = - 8 ; x = 8 , y = - 9$
C) $x = - 9 , y = - 8 ; x = - 8 , y = - 9$
D) $x = - 9 , y = 8 ; x = - 8 , y = 9$