Tickets to a local movie were sold at $4.00 for adults and $2.50 for students. If 287 tickets were sold for a total of $1107.50, how many adult tickets were sold?

Answer 1

4 a + 2.5 s = 1107.50
a + s = 287

4 a + 4 s = 1148
4 a + 2.5 s = 1107.50
-----------------------------subtract
1.5 s = 40.5
s = 27
a = 287 - 27 = 260