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2014-11-12T14:34:46+02:00
A+b+c=7614; a+b=6047; b+c=4349; => 6047+c=7614; c=7614-6047; c=1567; a+ 4349=7614 => a=7614-4349 a= 3265; 3265 +b=6047=> b= 6047-3265 ; b=2782
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