Metoda grafica
a + b = 64 → suma celor doua numere
a : b = 5 rest 4
a = 5 × b + 4
a l-----l-----l-----l-----l-----l + 4 } suma lor = 64
b l-----l
64 - 4 = 60 → suma celor 6 parti egale
60 : 6 = 10 → al doilea numar ( b)
64 - 10 = 54 → primul numar ( a )
sau: 5 × 10 + 4 = 54 ( a)
Verific: 54 + 10 = 64 → suma numerelor
54 : 10 = 5 rest 4