Question

Dupa ce a parcurs 3 supra 5 dintr-un traseu si inca 12 km,un turism mai are de parcurs o treime din traseu. Ce lungime avea intregul traseu?

Answer 1

3y/5+12km=y-y/3
3y/5+12km=3y/3-y/3
3y/5+12km=2y/3
⇒12km=2y/3-3y/5
⇒12km=10y/15-9y/15
⇒12km=y/15
⇒y=12km·15
⇒y=180km[lungimea traseului];