Odpowiedzi

2010-03-30T17:06:45+02:00
X - wiek Edka
3+x - wiek Ewy
x-3 - wiek Ali

x + 3 + x = 29
2x = 26 / :2
x = 13

Wiek Edka = x = 13
Wiek Ewy = 3+x = 3+13 = 16

WIEK ALI = x - 3 = 13-3 = 10

Alicja ma 10 lat
2010-03-30T17:07:54+02:00
X - wiek Edka
3+x - wiek Ewy
x-3 - wiek Ali

x + 3 + x = 29
2x = 26 / :2
x = 13

Wiek Edka = x = 13
Wiek Ewy = 3+x = 3+13 = 16

WIEK ALI = x - 3 = 13-3 = 10

odp: Alicja ma 10 lat
2010-03-30T17:10:30+02:00
Edek i Ewa = 29
Edek = 13
Ewa = 13 + 3 = 16
Ala = 13 -3 = 10
Odp.:
Ala ma 10 lat.