Solve the System by Using Either the Substitution Method or the Elimination-By-Addition

Multiple Choice

Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. $$\left( \begin{array} { l } \frac { 1 } { 4 } x - \frac { 1 } { 20 } y = 10 \\\frac { 1 } { 4 } x + \frac { 1 } { 8 } y = - 11\end{array} \right)$$

A) (18, -122)
B) (16, -120)
C) (18, -120)
D) dependent
E) inconsistent