Răspuns :
Daca a citit 2 /7,mai are de citit 7/7-2/7=5/7
5/7 •x=70
5x=70•7
5x=490
x=490:5
x=96
Daca a citit 2 /7,mai are de citit 7/7-2/7=5/7
5/7 •x=70
5x=70•7
5x=490
x=490:5
x=96