To solve this one, you need to realize that you are dealing with two types of information. First is the number of tickets of each type, and second is the VALUE of each of the two types of tickets.
Step 1:
Let's call the number of student tickets S, and the number of adult tickets A.
Since we know that 22,000,000people attended (which we have to presume means that 22,000,000 tickets were sold), we can write: s+a=22,000,000
Step 3:
Since each student ticket costs $66, the total amount of money collected for all of the student tickets sold is dollars. Similarly, the adult tickets account for dollars worth of the $ total amount collected. Now we can write: 2s 3a= and wat is the answer