Răspuns:
224, 210, 254
Explicație pas cu pas:
[tex]a+b+c =688\\\\2*(a+b) = 868 => a+b = 434\\\\ (b+c):2 = 232 => b+c = 464[/tex]
[tex]434 + c = 688 => c = 688 - 434 => c = 254\\\\b + 254 =464 => b = 464-254 => b = 210\\\\a = 434 - 210 => a = 224[/tex]
verificare: 224+210+254 = 688
