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2014-02-27T17:08:26+02:00
A+b+c=2450    a= 250+b      deci b=a-250 si   a= 180+c  deci c=a-180   Inlocuiesc in prima ecuatie pe b si c   a+(a-250)+(a-180)=2450    3a-250-180=2450   3a=2450+250+180  
3a=2880  a=2880:3=960    b=a-250   b=960-250=710   c=a-180   c=960-180=780
Verificare   960+710+780=2450