Răspuns :
a + b = 80
a = 4 × b
4 × b + b = 80
5 × b = 80
b = 80 : 5
b = 16
a = 4 × 16
a = 64
a = 4 × b
4 × b + b = 80
5 × b = 80
b = 80 : 5
b = 16
a = 4 × 16
a = 64
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in total 80
avem 5 segmente egale
80:5=16 primul numar
16×4=64 al doilea numar
VERIFICARE
16+64=80
