A movie theater charges $7 for adults and $3 for seniors on a particular day when 324 people paid an admission the total receipts were 1228 how many were seniors and how many were adults?

Let the number of adult tickets be a. Let the number of senior tickets be s. We're given two equations:

a + s = 324

7a + 3s = 1228

We have a set of simultaneous equations we can solve using 3 methods: