Răspuns :
Daca a+c=54=> b=89-54=35. Daca b+c=48=>a=89-48=41 dar b=35=> c=48-35=13.
a + b + c = 89 a + b + c = 89 a + c = 54
a + c = 54 b + c =48 41 + c = 54
54 + b = 89 a + 48 = 89 c = 54 - 41
b = 89 - 54 a = 89 - 48 c = 13
b = 35 a = 41
Verificare: a + b + c = 41 + 35 + 13 = 89
a + c = 54 b + c =48 41 + c = 54
54 + b = 89 a + 48 = 89 c = 54 - 41
b = 89 - 54 a = 89 - 48 c = 13
b = 35 a = 41
Verificare: a + b + c = 41 + 35 + 13 = 89