180 kg mere......70 kg banane........710 lei
60 kg mere.....17 kg banane..........205 lei | ×3
180 kg mere......70 kg banane......710 lei
180 kg mere.......51 kg banane.......615 lei
_________________________________ ( -)
// 19 kg banane.........95 lei
1 kg banane = 95 : 19 = 5 lei
1 kg mere = [710-(70×5)]:180 = (710-350):180 = 360 : 180 = 2 lei
Raspuns:
5 lei= 1 kg banane
2 lei = 1 kg mere
SUCCES!