Question

There were some people on a train.

18 people get off the train at the first stop and 21 people get on the train.
Now there are 65 people on the train.
How many people were on the train to begin with?​

Answer 1

62

Explanation:

let there be X people in the beginning

so

X-18+21=65

X+3=65

X=65-3

X=62