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2014-03-31T21:20:13+03:00
Notam a,b,c cele 3 nr.
(a+b+c)/3=2,5=> a+b+c=7,5
a=0,7+b;
b=2c;
=>a=0,7+2c
0,7+2c+2c+c=7,5
=>5c=6,8 =>c=1,36
b=2,72; a=3,42