Question

Cine stie ...va rog frumos

Answer 1

5×3×3=45
45×3=135
Sper ca ti-am fost de folos

Answer 2

   
[tex]\displaystyle\\ \text{ Folosim formulele:}\\ \text{1) Treimea lui a }=\frac{1}{3}\times a\\\\ \text{2) Intreitul lui a }=3\times a\\\\ \text{Rezolvare:}\\\\ \text{Notam numarul cu } n.\\\\ \text{Treimea lui }n=\frac{1}{3}\times n\\\\ \text{Treimea treimii lui n este egal cu 5 }\\\\ \frac{1}{3}\times \Big(\frac{1}{3}\times n\Big)=5\\\\ \frac{1}{3}\times \frac{1}{3}\times n=5\\\\ \frac{n}{9}=5\\\\ n = 5\times9=\boxed{45}\\\\ \text{Intreitul lu n este:}\\\\ 3n=3\times 45 = \Boxed{135} [/tex]