On monday, 220 students went on a trip to the zoo. all 4 buses were filled and 8 students had to travel in cars. how many students were in each class and what is the algebraic equation to this?

If you would like to know how many students were in each class, you can calculate this using the following steps:

4 buses * x + 8 students = 220 students
4 * x + 8 = 220
4 * x = 220 - 8
4 * x = 212      /4
x = 212 / 4
x = 53

53 students were in each bus.