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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.
x - 3 - Ala
x+3 - Ewa
x+x+3 = 29
2x + 3 = 29 / - 3
2x = 26 /:2
x = 13
x - 3 = 13-3 = 10
Odp Ala ma 10 lat
Odp. Ala ma 10 lat.