An aquarium has 72 fish in it. The number of females (F) is twice the number of males (M) How many males and females are in the aquarium

Question

I need help with this math equation and i have class next period so can any

of you guys help?

Answer 1

F = females

M = males

(1)  M + F = 72

(2)  F = 2M

Substitute (2) in (1)

M + 2M = 72

3M = 72

M = 72/3

M = 24 males

F = 2xM = 48 females