Question

The sum of two numbers is 21 and their difference is 5

Answer 1

The two numbers are 13 and 8.

13 + 8 = 21

The difference (13 - 8) is 5.

Answer 2

X+Y = 21 ---> Y = 21-x

X-y = 5

x - (21-x) = 5

2x - 21 = 5

2x = 26

x = 13

13 and 8