Respuesta :

Answer: Becky is 7 years old

Step-by-step explanation:7x3=21

Answer: 7

Step-by-step explanation:

We already know that Johnny is 21, and that he is three times as old as Becky.


with this we can simply divide Johnnys age by the many times he’s as old as Becky


21/3 = 7

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