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2014-01-21T18:46:36+02:00
A+b+c=27
b=a+5
c=b+5=a+10
3a+15=27=>3a=12=>a=4=>b=9=>c=14
1 5 1
2014-01-21T18:55:07+02:00
A+b+c=27
a -----------
b ----------- 5
c ----------- 5 5    
27 - (5+5+5) = 12(3 seg egale)
12:3=4 (fiecare seg.)
a=4.
b=9
c=14.

4+9=13+14=27.
1 3 1