To simplify the expression \( \frac{9}{3}x + 4 + 2x \), we start by simplifying the term \( \frac{9}{3}x \):
\[ \frac{9}{3} = 3 \]
So the expression becomes:
\[ 3x + 4 + 2x \]
Now, combine the like terms \( 3x \) and \( 2x \):
\[ (3x + 2x) + 4 = 5x + 4 \]
Therefore, the simplified expression is:
\[ \boxed{5x + 4} \]