 
<translate> Bari b ya zama shekarun Bill na kwarewa kuma j ya zama shekarun Joan na kwarewa. Mun san cewa j - 5 = 3 ((b - 5) da kuma j = 2b. Sauya lissafi na biyu a cikin lissafi na farko, muna samun 2b - 5 = 3 ((b - 5). Ta hanyar ninkawa ta hanyar iyakance, muna samun 2b - 5 = 3b - 15. Ƙara 15 zuwa bangarorin biyu, muna samun 2b + 10 = 3b. Idan muka cire 2b daga bangarorin biyu, za mu samu 10 = b. Amsar ƙarshe: 10. <eng> 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. 