Răspunsuri

2014-11-17T13:39:56+02:00
A+b+c=170
a/b=1/2    a= b/2
b-c=20     c=b-20
b/2+b+b-20=170
b/2+2b=190  se amplifica cu 2
b+4b=380
5b=380
b=380/5=76
a=76/2=38
c=76-20=56


2 4 2