Respuesta :

176213

Answer: I don't know about the formula, but consider the logic below.

Step-by-step explanation:

Martina = 12

Joey = 0

12 x 3 = 36

36 - 3 = 33

If Joey was 21, Martina would be 33.

celestchavez10

Answer:

y = 15

Step-by-step explanation:

in 3 years Martina would be 15 and joey would be 5.

5 · 3 is 15 so

x being joey

y being martina

x · 3 = 15

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