Answer:
Step-by-step explanation:
If we let v and b represent the seating capacity of vans and buses, respectively, then the two trips can be described by ...
 8v +8b = 240
 4v +b = 54
Dividing the first equation by 8 gives ...
 v +b = 30
Subtracting that from the second equation gives ...
 3v = 24
 v = 8 . . . . . . . . . . . divide by 3
 b = 30 -8 = 22
The number of students in each van is 8; the number in each bus is 22.