Question

iin 3 hoteluri s- au cazat 989 de turisti. In primele 2 hoteluri s- au cazat 676 de turisti, iar in ultimile doua 584 de turisti . Cati turisti s- au cazat in fiecare hotel?

Answer 1

a+b+c=989
a+b=676
b+c=584
cati tursiti s-au cazat in al treilea hotel?
989-676=313
cati turisti s-au cazat in primul hotel?
989-584=405
cati turisti s-au cazat in al doilea hotel?
989-313-405=271   sau 584-313=271
proba 584+313+271=989

Answer 2

a+b+c=989
a+b=676
b+c=584
676+c=989
c=989-676
c=313 turisti in al treilea hotel
b+313=584
b=584-313
b=271 turisti in al doilea hotel
a+271=676
a=676-271
a=405 turisti in primul hotel
V:405+271+313=989