Number of non-students: x
Number of students: 5x - 30 (30 less than five times the number of non-students)
Registration fees:
Non-students: 50 (x)
Students: 35 (5x - 30)
Total amount collected: 9, 975
Equation:
(50x) + (175x - 1050) = 9,975
50x + 175x - 1,050 = 9,975
225x = 9,975 + 1,050
225x = 11,025
225x/225 = 11,025
x = 49
Participants in the fun run:
Non-students: x = 49 students
Students: 5x-30 ⇒ 5(49) - 30 ⇒ 245 - 30 = 215 students.
There are 215 students and 49 students who joined the event.
Check:
50 (49) + 215 (35) = 9,975
2,450 + 7,525 = 9,975
9,975 = 9,975