Răspuns:
[tex]a+b+c = 9674\\\\a+b = 7449 \\\\\:inlocuim \: in \: prima\: relatie\\ \\7449 + c = 9674 \Rightarrow c = 9674-7449 \Rightarrow \boxed{c = 2225}\\\\b+ c = 7781 \Rightarrow b + 2225 = 7781 \Rightarrow b = 7781-2225 \Rightarrow \boxed{b=5556}\\\\a + 5556 = 7449 \Rightarrow a = 7449-5556\Rightarrow \boxed{a=1893}[/tex]
Verificare: 1893 + 555+ +2225 = 9674 (adevarat)