Odpowiedź:
a - wiek Pani Ali
c - wiek córki pani Ali
[tex]\left\{ \begin{array}{ll} a = 3c \\ a - 8 = 11(c - 8) \end{array}[/tex]
a - 8 = 11(c - 8)
a - 8 = 11c - 88
3c - 8 = 11c - 88
-8c = - 80
c = 10
a = 3 * 10 = 30
[tex]\left\{ \begin{array}{ll} a = 30 \\ c = 10 \end{array}[/tex]
Odp. Pani Ala ma 30 lat, jej córka ma 10 lat.