Math New Drill : Level 1 : Sum and Difference Problem2(5) ATOMIGAKUEN-2014

When 4 bottles of water are distributed to each member of a certain soccer team, 8 bottles remain.
When 5 bottles are distributed, 8 bottles run short.
Find the number of people of the team and the number of the bottle of water.


Answer
16 persons
72 bottles

Solution
It'll be 8 + 8 = 16 bottles need to increase 1 bottle of the water distributed to each person.
Therefore the number of people is 16/1 = 16 persons.
The number of the bottle of water is 4 × 16 + 8 = 72.