Question

Mihai are de 3 ori mai ulte masinute decat Alex.Daca mihai ii da lui Alex 15,ei vor avea acelas numar de masinute.Cate masinute are fiecare baiat?

Answer 1

m=3a
m-15=a+15=>m=a+30
a+30=3a=>30=3a-a=>a=30:2=>a=15 masinute are Alex
m=3z15=45 masinute are Mihai