2009 AMC 8 Problem 19

Two angles of an isosceles triangle measure 70^\circ and x^\circ. What is the sum of the three possible values of x?

\textbf{(A)}\ 95\qquad\textbf{(B)}\ 125\qquad\textbf{(C)}\ 140\qquad\textbf{(D)}\ 165\qquad\textbf{(E)}\ 180

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.