1ciocolata=6paini
1ciocolata+4paini=10lei
---------------------------|-
1paine=...lei?
1ciocolata=...lei?
---------------------|-|---
♦6paini+4paini=10lei
10paini=10lei
1paine=1leu
♦1ciocolata+4paini=10lei
1ciocolata+4lei=10lei
1ciocolata=10lei -4 lei
1ciocolata= 6lei
♦coroana plzz