Răspunsuri

2014-04-02T22:10:46+03:00
Notezi a,b,c

b=a+10
b=c-10           => a+10=c-10 => c=1+20

(a+b+c)/3=50 => a+b+c=150

Inlocuiesti pe fiecare functie de a : a+(a+10)+(a+20) = 150
3a+30=150
3a=120
a=40

=> b=a+10=50
=>c=a+20 = 60