Question

Intr-o clasa de 24 elevi, baieti sunt cu 6 mai multi de cit fete, cite fete sunt in clasa.

Answer 1

a +b= 24
b=a+6
a+a+6= 24
2a=24-6
2a=18
a=9
b=9+6
b=15

9+15=24

Answer 2

b+f=24------f+6+f=24-----2f=24-6------2f=18---------f=18:2--------f=9

b=f+6------------b=9+6=15

verificare: 15+9=24 elevi