Solve the System by the Method of Substitution $$\left\{ \begin{array} { r } 2 x + y = 9 \\- x + y = 0\end{array} \right.$$

Multiple Choice

Solve the system by the method of substitution.Check your solution(s) graphically.​ $$\left\{ \begin{array} { r } 2 x + y = 9 \\- x + y = 0\end{array} \right.$$ ​

A) (-5,-5)
B) (3,3)
C) (5,5)
D) (-3,-3)
E) (5,3)