Answer:
15x = 200
Explanation:
Why 15x?
We are told that the number of hours is x and that you are earning $15 an hour. If you are earning $15 an hour we have to multiply x by $15 where x is the number of hours you work.
Why = 200?
The headphones cost $200 so the money has to equal to 200 so we would be able to find out how many hours it would take earn $200
Hope this helps, have a lovely day! :)