Question:
Mr Ding had 84 more haversacks than Mr En at first. After Mr En sold 25 haversacks to Mr Ding, Mr Ding had 3 times as many haversacks as Mr En. How many haversacks did Mr En have at first?

Solution:

Empowering Students and Parents with Solutions
Mr Ding had 84 more haversacks than Mr En at first. After Mr En sold 25 haversacks to Mr Ding, Mr Ding had 3 times as many haversacks as Mr En. How many haversacks did Mr En have at first?