Prima zi dimineata: 1/3 * 117kg vandute adica [tex] \frac{117}{3}= 39kg[/tex] vandute
Prima zi dupa-amiaza: 24kg
A doua zi: Necunoscut inca.
[tex]Ziua1dimineata+Ziua1dupaamiaza+Ziua2=117kg[/tex]
[tex]Ziua1dimineata=39kg[/tex]
[tex]Ziua1dupaamiaza=24kg[/tex]
[tex]Ziua2=117kg-Ziua1dimineata-Ziua1dupaamiaza=117kg-39kg-24kg=54kg_{vandute}[/tex]