Odpowiedź:
p - wiek pana Macieja
s - wiek Mateusza
[tex]\left\{ \begin{array}{l} p = 3s \\ p - 4 = (s - 4) * 4 \end{array}[/tex]
[tex]\left\{ \begin{array}{l} p = 3s \\ p - 4 = 4s - 16 \end{array}[/tex]
3s - 4 = 4s - 16
- s = - 12
s = 12
p = 3s
p = 3 * 12
p = 36
[tex]\left\{ \begin{array}{} p = 36 \\ s = 12 \end{array}[/tex]
Odp. Pan Maciej ma 36 lat, a jego syn 12.
