 <translate> Let X be the number of children in the group. The number of adults in the group is X + 25. The group pays 8 * X + 15 * (X + 25) = $720. Multiplying through the parentheses, we get 8X + 15X + 375 = $720. Combining like terms, we get 23X + 375 = 720. Subtracting 375 from both sides, we get 23X = 720 - 375 = $345. Dividing both sides by 23, we get X = $345 / 23 = 15 children. The final answer: 15. <yor> Jẹ́ kí X jẹ́ iye àwọn ọmọdé tó wà nínú àwùjọ náà. Nọmba awọn agbalagba ninu ẹgbẹ jẹ X + 25. Ẹgbẹ́ náà máa san 8 * X + 15 * (X + 25) = $720. Tá a bá fi àwọn àlàfo yìí kún wọn, a ó rí 8X + 15X + 375 = $720. Tá a bá pa àwọn ọ̀rọ̀ tó jọra pọ̀, a máa rí 23X + 375 = 720. Tá a bá yọ 375 kúrò ní ìhà méjèèjì, a ó rí 23X = 720 - 375 = $345. Tá a bá pín àwọn ìlà méjèèjì sí mẹ́tàlélógún, a ó rí i pé X = $345 / 23 = ọmọ mẹ́ẹ̀ẹ́dógún. Ìdáhùn tí wọ́n fún un níkẹyìn ni pé: 15. 