Question

Dupa ce a parcurs 1/4 dintr-un traseu si apoi 3/4 din rest ,un excursionist mai are de parcurs 18 km .Aflati lungimea traseului.

Answer 1

x-x/4=4x/4-x/4=3x/4
3/4 ·3x/4=9x/16
3x/4-9x/16=12x/16-9x/16=3x/16
3x/16=18
x=16·18/3
x=16·6
x=96(km-lungimea traseului);