 
 <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. <ibo> Ka b bụrụ afọ ahụmahụ Bill na j bụrụ afọ ahụmahụ Joan. Anyị maara na j - 5 = 3(b - 5) na j = 2b. N'ịgbanwe ntụnyere nke abụọ n'ime ntụnyere nke mbụ, anyị na-enweta 2b - 5 = 3(b - 5). N'ịgbasa site na parentheses, anyị na-enweta 2b - 5 = 3b - 15. Na-agbakwunye 15 n'akụkụ abụọ, anyị na-enweta 2b + 10 = 3b. Ichefu 2b n'akụkụ abụọ, anyị na-enweta 10 = b. Azịza ikpeazụ ya bụ: 10. 