 
 <translate> Let's say the number of fish that was in the tank before was x. If you caught 4 fewer fish than the number that was there, then you caught x - 4. After adding x - 4 fish into the tank, the tank now had 20 fish, meaning the total number of fish in the tank is x + x - 4 = 20. 2x = 20 + 4. The total number of fish that was initially in the tank is 2x = 24. Initially, there were x = 24 / 2 fish in the tank. x = 12. If you caught 4 fewer fish than the number in my tank initially, you caught 12 - 4 = 8 fish. The answer: 8. <ibo> Ka anyị kwuo na ọnụọgụgụ nke azụ ndị nọ na tankị ahụ bụ x. Ọ bụrụ na i jidere azụ 4 karịa ọnụọgụgụ ahụ dị ebe ahụ, mgbe ahụ i jidere x - 4. Mgbe e tinyesịrị azụ x - 4 n'ime tank, tank ahụ nwere azụ 20 ugbu a, nke pụtara na ngụkọta ọnụ ọgụgụ azụ dị n'ime tank bụ x + x - 4 = 20. 2x bụ 20 + 4. Ọnụ ọgụgụ azụ̀ ndị dị na mbụ n'ime tankị ahụ bụ 2x = 24. Na mbụ, azụ̀ ndị dị n'ime tankị ahụ bụ x = 24 na ọkara. x = 12. Ọ bụrụ na i gbutere azụ̀ 4 ole na ole karịa ndị ahụ m gbutere ná mmalite, ị gbutere azụ̀ 12 - 4 = 8. Azịza ya bụ: 8. 