1. Cutia goala=70g
Cutia plina= 1/7*x=70
x=70*7=490
Cutia plina=490g
Continutul=490-70=420g
2. 1/3x=9lei
x=9*3=27 lei
Atlas=27-9=18 lei
4. Mama=35 ani
7/10Matusa=35
Matusa=35*10/7
Matusa=350/7
Matusa=50
2/3Matusa=Bunica
2/3*50=Bunica
Bunica=150/2=75 ani
Sper sa te ajute.
Si la exercitiul 3
2/5Pasari=24
Pasari=24*5/2=60
Gaini=24
Curci+Rate=60-24=36
Curci=36/2=18
Rate=Curci=18