Solve the System of Equations by Using Substitution $$\left\{ \begin{array} { c } x + 7 y = 7 \\3 x - 8 y = - 8\end{array} \right.$$

Multiple Choice

Solve the system of equations by using substitution.
- $$\left\{ \begin{array} { c } x + 7 y = 7 \\3 x - 8 y = - 8\end{array} \right.$$

A) $x = 1 , y = 0$
B) $x = 0 , y = 0$
C) $x = 0 , y = 1$
D) $x = 1 , y = 1$