Senior citizen = c
Student = s
Equations
9c + 12s = 297
2c + 13s = 221
Solve by elimination
2(9c + 12s = 297)
-9 (2c + 13s = 221)
18c + 24s = 594
-18c - 117s = -1989
0 - 93s = -1395
s = -1395/-93
s = 15
9c + 12(15) = 297
9c + 180 = 297
9c = 297 - 180
9c = 117
c = 117/9
c = 13
The price of a Senior Citizen ticket is $13 and the price of a Student ticket is $15