The sum of the ages of a father and his son is 45 years. Five years ago, the product of their ages was 34. What is the father's current age?

पिता = F, पुत्र = S मान लें। F+S=45. पांच साल पहले: (F-5)(S-5)=34. S=45-F रखने पर, हमें (F-5)(40-F)=34 प्राप्त होता है। हल करने पर F=39 मिलता है।