PASCAL 2020 Problem 16

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

Answer Choices
A. 3(x+2)
B. \frac{-9 x-18}{-3}
C. \frac{1}{3}(3 x)+\frac{2}{3}(9)
D. \frac{1}{3}(9 x+18)
E. 3 x-2(-3)