7. What the sum of the equation solutions?

$$\begin{array}{lcl} What\:is\:the\:sum\:of\:the\:solutions\:of\:the\\ equation:\:x^{2}-6x-7=0\:?\\ \\ (A)\:-4\\ \\ (B)\:6\\ \\ (C)\:9\\ \\ (D)\:-5\\ \\ (E)\:5\\ \end{array}$$