To find the number of boxes Trina sold, we can start with the information we have:
Yuri sold 14 boxes, and together they sold a total of 37 boxes. We can set up the equation based on this information:
\[ n + 14 = 37 \]
Now, we can solve for \( n \):
- Subtract 14 from both sides:
\[ n = 37 - 14 \]
- Calculate:
\[ n = 23 \]
Therefore, Trina sold 23 boxes.
So the correct equation representing the number of boxes Trina sold is:
n + 14 = 37; Trina sold 23 boxes.