[tex]A+B+C=1762 \\ A+B=1126 \\ B-C=216 \\ 1126+C=1762 \Rightarrow C=1762-1126 \Rightarrow \boxed{C=636} \\ B-636=216 \Rightarrow B=216+636\Rightarrow \boxed{B=852} \\ A+852=1126 \Rightarrow A=1126-852 \Rightarrow \boxed{A=274} \\ Verificare :274+852+636=\boxed{1762}[/tex]