a + b + c = 48 → suma celor 3 numere a, b, c
a + b = 26
b + c = 28
__________________
48 - 28 = 20 ( a ) → primul numar
26 - 20 = 6 ( b ) → al doilea numar
28 - 6 = 22 ( c ) → al treilea numar
Verific:
20 + 6 + 22 = 48 → suma celor 3 numere
20 + 6 = 22 → suma primelor doua numere
6 + 22 = 28 → suma ultimelor doua numere ( b si c )
