Respuesta :
We can write this out with the following, if kids who went on the bus is x and kids who went with their parents is y.
x + y = 120
we know that y = 10, since 10 kids went with their parents.
plug this in to the original equation
x + 10 = 120
x = 110.
since there are two charter buses, divide 110 by 2.
There were 55 students on each charter bus.