2020 Pascal Problem 16

Which of the following expressions is not equivalent to 3x + 6?

\textbf{(A)}\ 3(x+2)\quad \textbf{(B)}\ \frac{-9x-18}{-3}\quad \textbf{(C)}\ \frac{1}{3}(3x)+\frac{2}{3}(9)\quad \textbf{(D)}\ \frac{1}{3}(9x+18)\quad \textbf{(E)}\ 3x-2(-3)

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Pascal contests here.