a+b+c=55
a+b=36
b+c=40
=============
a,b,c=?
a= (a+b+c)- (b+c)
= 55-40
a= 15
c= (a+b+c) - ( a+b)
= 55- 36
c=19
b= (a+b+c)- (a+c)
a+c= 15+19= 34
= 55- 34
b=21
RASPUNS: A= Dana= 15castane
B= Irina= 21 castane
C =Nina = 19castane
Sper ca a fost de ajutor !!! Please coronita!!!