Răspunsuri

2014-04-02T19:15:04+03:00
Adunand toate 3 relatiile se obtine :
4a+4b+4c=432  /:4
a+b+c=108

2a+b+c=142
a+b+c=108
a=34

a+2b+c=144
a+b+c=108
b=36

a+b+2c=146
a+b+c=108 
c=38