Respuesta :

cletushumphrey

Answer: Consecutive numbers: 20, 21, 22

Step-by-step explanation:

Three consecutive whole numbers: x, x+1, x+2

Avg. = [x + (x + 1) + (x + 2)] / 3 = 21

[3x + 3] / 3 = 21

3x + 3 = 63

3x = 60

x = 20

x + 1 = 21, x + 2 = 22

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