sum of two numbers

Question

the sum of two numbers is 20. one is three more than the other. What are the numbers?

Answer 1

Let x = the smaller number

Let x + 3 = the larger number

x + x + 3 = 20

2x = 17

x = 8 1/2

x + 3 = 8 1/2 + 3

larger number = 11 1/2