During lunchtime, the canteen is offering meatballs to students. Every student gets the same number of meatballs, then there are $20$ meatballs left. Later, another student comes to the canteen and he gets the same amount of meatballs just like the others, now there are only $10$ meatballs left. How many meatballs does every student get? 
Overseas Competition->Knowledge Point->Word Problem Modules->Distribution Problems