 <translate> Let b be Bill's years of experience and j be Joan's years of experience. We know that j - 5 = 3(b - 5) and j = 2b. Substituting the second equation into the first equation, we get 2b - 5 = 3(b - 5). Multiplying through the parentheses, we get 2b - 5 = 3b - 15. Adding 15 to both sides, we get 2b + 10 = 3b. Subtracting 2b from both sides, we get 10 = b. Final answer: 10. <yor> Jẹ́ kí b jẹ́ ọdún tí Bill ti lò láyé, kí j sì jẹ́ ọdún tí Joan lò láyé. A mọ̀ pé j - 5 = 3(b - 5) àti j = 2b. Tí a bá fi àfikún kejì sí àfikún àkọ́kọ́, a ó rí 2b - 5 = 3(b - 5). Tá a bá fi àwọn àlàfo yìí kún un, a ó rí 2b - 5 = 3b - 15. Bá a bá fi 15 kún ìhà méjèèjì, a ó rí 2b + 10 = 3b. Tá a bá yọ 2b kúrò ní ìhà méjèèjì, a máa rí 10 = b. Ìdáhùn tó péye: Mẹ́wàá. 