!!PLEASE HELP ME I NEED GENUINE HELP AND EXPLAINATIONS!!

Question

a certain ride offers a discount of $1 on the full price of the ride when 10 or more tickets are purchased. if 20 discount tickets cost the same as fifteen full-price tickets, find the cost of each type of ticket.

Answer 1

Suppose a full price ticket costs f.

Then 15 full price tickets cost 15f

If >10 tickets are purchased, price per ticket is f-1

So 20 discount tickets cost 20 (f-1)

So 15f = 20 (f-1)

15f = 20f - 20

20 = 5f

f = 20/5 = 4

So full price ticket is 4, discount ticket is 3