Natalie is a softball coach. She has a private pitching lesson with Kasey. Kasey's mom pays Natalie $11 per hour plus a $6 tip.

The correct equation was 11x + 6 = 39.
How many hours was the lesson?

To find out how many hours the lesson was, we need to solve for x in the equation 11x + 6 = 39.

Subtract 6 from both sides:
11x = 33

Divide by 11 on both sides:
x = 3

Therefore, the lesson was 3 hours long.