Răspunsuri

2014-04-28T15:53:33+03:00
A+b+c=42
a-k=3=> a=k+3
b-k=5=> b=k+5
c-k=7 =>c=k+7

k+3+k+5+k+7=42
3k+15=42
3k=27
k=9

a=9+3 => a=12
b=9+5 => b=14
c=9+7 => c=16
1 1 1