a+b=50201 ; b+c=82021 ; a+c=41810 a+b+b+c+a+c=50201+82021+41810 2a+2b+2c=174032 2(a+b+c)=174032 => a+b+c=174032:2 => a+b+c=87016 50201+c=87016 => c=87016-50201 => c=36815 a+36815=41810 => a=41810-36815 => a=4995 4995+b=50201 => b=50201-4995 => b=45206