Răspuns :
a+b=28
a>b de 3 ori
a |-----|-----|-----|
b |------|
4 segmente
28:4=7 b
7x3=21 a
a>b de 3 ori
a |-----|-----|-----|
b |------|
4 segmente
28:4=7 b
7x3=21 a
|_____|
|_____|______|______|
Suma lor 28
28:4 =7 primul nr.
7×3=21 al doilea
21+7= 28