Answer:
The original number of passengers on the bus decreased by 10 after the second stop.
Step-by-step explanation:
at 2:30:
15 passengers got off and 9 got on.
This means that the number of passengers = x - 15 + 9 ;number of passengers = x -6
10 minutes later:
4 passengers got off the bus
This means that the number of passengers = (x-6) - 4 ;number of passengers = x - 10
The original number of passengers on the bus decreased by 10 after the second stop