Question

I would really like to get some help :)

Answer 1

y = 15

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

Answer 2

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

Explanation:

Martina = 12

Joey = 0

12 x 3 = 36

36 - 3 = 33

If Joey was 21, Martina would be 33.