Question

The sum of two numbers is 52​, and the difference between the numbers is 2. Find the numbers.

Answer 1

The difference between them is 2, so let the unknown numbers be x and (x+2). 

Their sum is 52, so: 
52 = x + (x+2) 
52 = x + x + 2 
50 = x + x 
50 = 2x 
25 = x 

So your unknown numbers x and (x+2) are 25 and 27.