Question

During summer vacation, you charge people $8 per hour for swimming lessons and a $20 registration fee. If you make $52 one day, how many hours did you spend teaching lessons?

Answer 1

4 hours of lessons.

$8 * 4 hrs = 32

Add the additional $20 registration fee and you got $52.

Answer 2

8 times 4 is 32, and 32 plus the 20 registration fee equals $52. So in total you spend 4 hours teaching swimming lessons.