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

question 11

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)