To solve this problem you create an equation that equals 28 and had all students in terms of Alaina. Alaina can be represented with x.
Miguel has twice as many as Alaina so he has 2x fish.
Kira has twice as many as Miguel so 2*2x = 4x
Alaina (X) + Miguel (2X) + Kira (4X) = 28 fish
combine like terms
7x=28
Divide both sides by 4
x=4
Alaina has 4 fish (x = 4)
Miguel has 8 fish (2x = 2*4 = 8)
Kira has 16 fish (4x = 4*4 = 16)
