a + b + c = 12 356
a = b + 1821 ==> b = a - 1821
a = c + 586 ==> c = a - 586
inlocuim in prima relatie in functie de a
a + a - 1821 + a - 586 = 12 356
3×a = 12 356 + 2407
3×a = 14 763
a = 14 763 : 3
a = 4 921
b = 4 921 - 1821 = 3 100
c = 4 921 - 586 = 4 335
verificare:
4 921 + 3 100 + 4 335 = 12 356