Răspunsuri

2014-10-25T11:01:33+03:00
Pn - Pv =18480     Pn/3 = 3Pv/4 ⇒ Pn =9Pv/4 ⇒ 9Pv/4 - Pv =18480 
5Pv/4 = 18480 ⇒ Pv =18480·4 / 5 = 14784