Question

One number exceeds another by 18 and their sum is 36.

Answer 1

x - first number

x + 18 - second number

x + (x + 18) = 36

x + x + 18 = 36

2x + 18 = 36        | - 18

2x = 18           | : 2

x = 9

First number: x = 9

Second number: x + 18 = 9 + 18 = 27

Those numbers are 9 and 27.