Solve the System by Substitution,if Possible $$\left\{ \begin{array} { l } - 6 x + 7 y = 50 \\12 x + 14 y = 124\end{array} \right.$$

Multiple Choice

Solve the system by substitution,if possible.​ $$\left\{ \begin{array} { l } - 6 x + 7 y = 50 \\12 x + 14 y = 124\end{array} \right.$$ ​

A) (9,-6)
B) (1,8)
C) (-6,9)
D) (-7,10)
E) No solutions