Solve the System by Substitution $$\begin{aligned}x + 2 y & = 10 \\2 x - 7 y & = - 2\end{aligned}$$

Multiple Choice

Solve the system by substitution.
- $$\begin{aligned}x + 2 y & = 10 \\2 x - 7 y & = - 2\end{aligned}$$

A) $\{ ( 6,2 ) \}$
B) $\left\{ ( x , y ) \mid y = - \frac { 1 } { 2 } x + 5 \right\}$ ; The equations are dependent
C) $\{ ( 14 , - 2 ) \}$
D) $\{ ( 13,4 ) \}$