Can someone please answer

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Solve the equation. then check your solution 8=1.88+a

Explain how you can show five less than a number using an algebraic expression