The sum of two numbers is 25. One of the numbers exceeds the other by 9. Find the numbers.
Let the number be x.
Then the other number = x + 9
Sum of the two numbers = 25
⇒ x + x + 9 = 25
⇒ 2x + 9 = 25
⇒ 2x + 9 - 9 = 25 - 9
⇒ 2x = 16
⇒ 2x/2 = 16/2
⇒ x = 8 and x + 9 = 8 + 9 = 17.
Therefore, the required numbers are 8 and 17.