a+b+c=21
a|----|
b|----|----| } suma=21
c|----|----|----|----|
Adunam segmentele de la punctele a, b, c :
|----|+|----|----|+|----|----|----|----| = 7 segmente
Impărțim totalul la un segement:
21:7=3
Asa am aflat valoarea unui segment.
=> a=3
=>b=3×2=6
=>c=3×4=12
Verificam :
3+6+12=21
