Math ixl question

Question

Zachary is a kickboxing instructor who will be teaching classes local gym. To get certified as an instructor, he spent a total of $80. Zachary will be earning a base salary of $70 per month from the gym, plus an additional five dollars for every class he teaches. If Zachary teaches a certain number of classes during his first month as an instructor, he will earn back amount he spent on certification. How much will Zachary’s expenses and earnings be?

Answer 1

n represents the number of lessons

E(n) = 70 + 5n

Nohing more can be said.\

Is something missing from the post?