 
<translate> Idan ni na ninka na Billy sau 4 a yanzu, kuma Billy yana da shekara 4, shekaruna nawa ne lokacin da aka haifi Billy? Ka ba ni dalilai, kafin ka amsa tambaya <eng> If I'm 4 times older than Billy currently, and Billy is 4 years old, how old was I when Billy was born? Give me reasons, before answering the question 