Răspunsuri

2014-03-17T16:02:38+02:00
2014-03-17T16:05:08+02:00
Notam cu x suma initiala. 2/6x (pentru excursie) 1/6x ( pentru carte) x -( 2/6x+1/6x)= x- 3/6x= 6/6x-3/6x=3/6x= x/2=1/2x