Question

The sum of two numbers is 52 and the difference is 10. What are the numbers?

Answer 1

21 and 31.

Explanation:

If the 2 numbers are x and y then:

x + y = 52

x - y = 10 Adding these 2 equations to remove y:

2x = 62

x = 31.

So

31 - y = 10

31-10 = y

21 = y.

Answer 2

The numbers are 21 and 31