Jeffrey is a kickboxing instructor who will be teaching classes at a local gym. to get certified
as an instructor, he spent a total of $200. jeffrey will be earning a base salary of $50 per
month from the gym, plus an additional $3 for every class he teaches. if jeffrey teaches a
certain number of classes during his first month as an instructor, he will earn back the
amount he spent on certification. how many classes will that take?