Question

In trei hoteluri sau cazat 989de turisti.în primele doua hoteluri sau cazat 676de turisti iar in ultimele doua 584de turisti..Cati turisti sau cazat in fiecare hotel?

Answer 1

a+b+c=989
a+b=676
b+c=584

676+c=989
c=989-676
c=313

b+313=584
b=584-313
b=271

a+271=676
a=676-271
a=405

a=turisti cazati in primul hotel
b=turisti cazati in al doilea hotel
c=turisti cazati in al treilea hotel

Answer 2

I ; II ; III - am notat hotelurile
I+II+III=989
I+II=676
II+III=584
-----------------------------
I=?
II=?
III=?
Rezolvare
676+III=989
III=989-676
III=313 (turişti in al III lea hotel)
II+III=584
II+313=584
II=584-313
II=271 (turişti in al II lea hotel)
I+II=676
I+271=676
I=676-271
I=405 (turişti in primul hotel)

I=405 ; II=271 ; III=313

Verificare
405+271+313=989