Marian colectioneaza cartonase. Acum doua zile si-a cumparat 8 pachete a cate 6 cartonase. Ieri a primit de la colegul lui, Mihai, 5 pachete tot de 6 cartonase. Dar i-a dat inapoi 3 pachete. Cate cartonase are acum Marian?
(8x6+5x6)-3x6=(48+30)-18=78-18=60 cartonase
