I l---------l
1. Egalam partile: 47-4-3=40 euro
II l---------l 2.Cat a consumat I ? 40:4=10 euro
4 3. Cat a consumat II ?40:4=10 euro
III l---------l----l =47 4. Cat a consumat III? 10+4=14 euro
3 5. Cat a consumat IV ? 14+3=17 euro
IV l---------l----l---l