Question

The sum of two natural numbers is 20 while their difference is 4. Find the numbers.

Answer 1

Let the numbers be x and y,
∴ from the given conditions,
         x + y = 20
     `(+x -y = 4)/ (  2x=24) ` 
             x = 12

∴ 12 + y = 20                       ∴ y = 8
The numbers are 12 and 8