How to count the question in the description

Question

forty pupils in a class agreed to contribute equally to the community chest. on the day of collection, four pupils forgot to bring their share of the contribution. therefore, the remaining pupils had to contribute 25 cents more each to raise that required amount of money. How many cents must each pupil contribute originally

Answer 1

40(x) = 36(x + 25)

 

Because, 40(x) is the amount that should have been collected from forty students, and that is equal to 36 times the original amount each was intended to contribute plus 25 cents each.

 

I think you can solve it from here.