Dear All,

How to solve simply & model drawing for below problem:

At the first stop along a train route, some passengers boarded an empty train.

At the second stop, 3/10th of the passengers alighted and 84 passengers boarded the train.

At  the third stop, 2/7 th of the passengers alighted and 68 passengers boarded the train.

Train had 428 passengers at the end. HOw many passengers boarded the train at the first stop?

Source: Lianhua Primary