Răspuns:
7kg mere............5kg pere...............70RON x2
8kg mere...........10kg pere............110RON
14kg mere.....................10kg pere..............140RON
8kg mere .....................10kg pere...............110RON
6kg mere......................0kg pere..................30RON
1kg mere=30: 6=5RON
7 X5 ............5KG pere.............70RON
5Kg pere=70-35
5Kg pere=35RON
1Kg pere =35:5=7RON
Explicație pas cu pas: