Let the numbers be x and x + 3
(x + x + 3) / 3 = 5
(2x + 3) / 3 = 5
2x + 3 = 5 × 3
2x + 3 = 15
2x = 15 - 3
2x = 12
2x / 2 = 12 / 2
x = 6
Recall that the numbers are x and x + 3
Therefore
number 1 = x
number 1 = 6
and
number 2 = x + 3
number 2 = 6 + 3
number 2 = 9
Answer: The numbers are 6 and 9