Răspuns :
Fie x si y cele doua numere
Y=x+1
X+x+1=531
2x+1=531
2x=530
X=265
Y=265+1=266
a + a + 1 = 531
a + a = 530
a = 530 : 2
a = 265
a + 1 = 265 + 1
a + 1 = 266
Verificare ( V ) : 265 + 266 = 531
a + a = 530
a = 530 : 2
a = 265
a + 1 = 265 + 1
a + 1 = 266
Verificare ( V ) : 265 + 266 = 531