Let s represent the price of a student ticket. Then the revenue equation is
... 153s + 320(s +0.75) = 949.50
... 473s + 240 = 949.50 . . . . . . simplify
... 473s = 709.50 . . . . . . . . . . . subtract 240
... s = 1.50 . . . . . . . . . . . . . . . . . divide by 473
Student tickets were $1.50; adult tickets were $2.25.
