Răspuns :
a+b+c=40
a÷b=3=> a=3b
c÷a=3=> c÷3b=3=> c=6b
3b+b+6b=40
10b=40 =>b=40÷10 b=4
a=3×4 c=6×4
a=12 c=24
Succes.
a+b+c=40
a:b=3
c:a=2
a |-----|-----|-----|
b |-----| Toate segmentele dau 40
c |-----|-----|-----|-----|-----|-----|
Noi avem 10 segmente .
40:10=4 (un segment\numarul b)
4x3=12 (numarul a)
12x2=24 (numarul c)
Verificare: 12+4+24=40