Question

Intr-un vas era o anumita categorie de lichid. Zilnic se lua 2 pe 3 din cantitatea aflata in vas si inca 1 litru. In a patra zi a fost golit. Ce cantitate de licid a fost initial in vas

Answer 1

x=cantitate lichid
2x/3 +1= ziua 1
x-2x/3-1=x/3-1=rest
(x/3-1) ×2/3 +1 =2x/9-2/3+1=2x/9+1/3 =ziua2
x/3-1-2x/9-1/3=x/9-4/3=rest
(x/9-4/3)×2/3 +1 =2x/27-8/9+1=2x/27+1/9 =ziua 3
ziua a 4-a a fost golit
x/9-4/3-2x/27-1/9=0
x/27=13/9
x=39 l