Odpowiedź:
m - wiek mamy Kasi
k - wiek Kasi
[tex]\left\{ \begin{array} \ m - 5 = 4 * (k - 5) \\ m + 33 = 2 * (k + 33) \end{array}[/tex]
[tex]\left\{ \begin{array} \ m - 5 = 4k - 20 \\ m + 33 = 2k + 66 \end{array}[/tex]
m = 4k - 15
m + 33 = 2k + 66
4k - 15 + 33 = 2k + 66
2k = 48
k = 24
m - 5 = 4k - 20
m - 5 = 4*24 - 20
m = 81
[tex]\left\{ \begin{array} \ k = 24 \\ m = 81 \end{array}[/tex]
Odp. Mama Kasi ma 81 lat, Kasia ma 24 lata.
