Question

1000 soldiers in a fort had enough food for 20 days but some soldiers were transferred to another fort and the food lasted for 25 days. how many slodiers were transferred

Answer 1

20%2A1000+=+25%2A%281000-x%29
     25x = 5000
       x = 200 men transferred

Answer 2

You have to use algebra to find answer and i have written in the easiest way.
20=1000=25(1000-x)

25x = 5000
x = 200 men transferred