Răspunsuri

2014-10-25T15:45:40+03:00
( a+b+c )/3= 31
(a+b)/2= 21 rezulta ca a+b= 42
(b+c)/2= 40, rezulta ca b+c= 80
a+b+c= 31*3= 93
a= 93-b-c=93-80= 13
b= (a+b)-a= 42-13= 29
c=93-a-b= 93-42= 51
(13+29+51)/3= 93/3=31