Răspuns :
femei + barbati + copii = 178
femei + barbati = 105
femei + copii = 134
_______________________
178 - 105 = 73 copii
134 - 73 = 61 femei
178 - 134 = 44 barbati
Verific: 61 femei + 44 barbati + 73 copii = 178 persoane
femei + barbati = 105
femei + copii = 134
_______________________
178 - 105 = 73 copii
134 - 73 = 61 femei
178 - 134 = 44 barbati
Verific: 61 femei + 44 barbati + 73 copii = 178 persoane