Solve the system with the elimination method:

$\displaystyle {\left\lbrace\begin{array}{ccc} -{4}{x}+{4}{y}&=&-{3}\\-{2}{x}-{4}{y}&=&-{7}\end{array}\right.}$

Answer: ( , )

Enter your answers as integers or as reduced fraction(s) in the form A/B.