a+ b + c = 700
a + b + c [----------------------------------------------------------------------]
Spunem ca a = 2 x b si ca b = 2 x c => a = 2x (2x c) => a = 4 x c
Deci, facem :
c [----------] => 1 segment
b [----------][----------] => 2 segmente
a [----------][----------][----------][----------] => 4 segmente
a + b + c [----------][----------][----------][----------][----------][----------][----------] => 7 segmente => 700 = 7 segmente => 1 segment = 700 : 7 = 100
=> c = 1 segment = 100
=> b = 2 segmente = 200
=> a = 4 segmente = 400
Proba : a = 400
b = 200
c = 100
