 <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. <yor> Jẹ ki a sọ pe iye ẹja ti o wa ninu tanki ni iṣaaju jẹ x. Bí ẹ bá rí ẹja mẹ́rin tí ó kéré ju iye tí ó wà níbẹ̀ lọ, ẹ̀ẹ̀mejì ni ẹ̀ẹ̀mejì. Lẹ́yìn tí a fi ẹja x - 4 kún inú adágún náà, adágún náà ní ẹja 20 báyìí, èyí tó túmọ̀ sí pé iye ẹja tó wà nínú adágún náà jẹ́ x + x - 4 = 20. 2x = 20 + 4. Iye ẹja tí wọ́n kọ́kọ́ kó sínú adágún náà jẹ́ 2x = 24. Lákọ̀ọ́kọ́, àwọn ẹja tó wà nínú adágún náà jẹ́ x = 24 / 2. x = 12. Tó o bá rí ẹja mẹ́rin dín kù sí iye tí mo kọ́kọ́ rí nínú adágún mi, ẹja méjìlá ni wàá rí - mẹ́rin = mẹ́jọ. Ìdáhùn náà ni pé: 8. 