Răspuns :
z+r+c=365
r=c+5 c=r-5
z=3r
3r+r+r-5=365
5r=365+5
5r=370
r=74 reviste
z=3x74=222 ziare
222+74+c=365
296+c=365
c=365-296
c=69 carti
proba: 74+222+69=365
r=c+5 c=r-5
z=3r
3r+r+r-5=365
5r=365+5
5r=370
r=74 reviste
z=3x74=222 ziare
222+74+c=365
296+c=365
c=365-296
c=69 carti
proba: 74+222+69=365