 <translate> Let c be the number of cats and let d be the number of dogs. We know that c = 20 + d and that the total number of animals is c + d = 60. Replacing c gives 20 + d + d = 60 animals. Combining like terms and subtracting 20 from both sides, we get 2d = 40. Dividing both sides by 2, we get d = 40 / 2 = 20. The shelter therefore received 20 + 20 = 40 cats. The answer: 40. <yor> Jẹ́ kí c jẹ́ iye àwọn ológbò kí d sì jẹ́ iye àwọn ajá. A mọ̀ pé c = 20 + d àti pé iye àwọn ẹranko náà ni c + d = 60. Tá a bá fi c rọ́pò, a máa rí 20 + d + d = 60 ẹran. Tá a bá pa àwọn ọ̀rọ̀ tó jọra pọ̀, tá a sì yọ 20 kúrò lára wọn, a máa rí i pé 2d = 40. Tí a bá pín ìhà méjèèjì sí méjì, a ó rí d = 40 / 2 = 20. Nítorí náà, àwọn ológbò tí wọ́n kó wá sí ibi ìsádi náà jẹ́ ogójì [40]. Ìdáhùn náà ni pé: Ọgọ́ta. 