Apet store has three fish tanks, each holding a different volume of water and a different number of fish. tank aaa holds 40\text{ l}40 l40, space, l and 555 fish. tank bbb holds 100\text{ l}100 l100, space, l and 121212 fish. tank ccc holds 180\text{ l}180 l180, space, l and 232323 fish.