 
 <translate> Bobby has an aquarium with twice as many fish as Sarah's has. Sarah has 5 more fish in her aquarium than Tony does. Tony has 3 times as many fish in his aquarium as Billy does. Billy has 10 fish. How many fish do all 4 people have put together?
Thoughts? Step-by-step reasoning: <hau> Bobby yana da akwatin kifaye da kifi sau biyu fiye da na Sarah. Sarah tana da kifi 5 a cikin akwatin kifanta fiye da Tony. Tony yana da kifi sau uku a cikin akwatin kifaye kamar yadda Billy yake yi. Billy yana da kifi 10. Kifi nawa ne mutane 4 suka tara? Wani tunani? Dalili na mataki zuwa mataki: 