 
<translate> Nkebi nke abụọ na nke atọ nwere 20 * 2 = azụ̀ iri anọ. Ya mere na ngụkọta enwere 20 + 40 * 2 = 100 azụ. Azịza ya bụ otu narị. <eng> The second and third tank each have 20 * 2 = 40 fish. So in total there are 20 + 40 * 2 = 100 fish.
The answer: 100. 