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Ela = x
Hania = x-4
Za 6 lat
x + 6 + x + 2 =34
2x = 34 - 8
2x = 26||2
x = 13
Ela ma teraz 13 lat, natomiast Hania 9.
Za 6 lat, Ela będzie miała 19 lat a Hania 15. Suma ich lat będzie równa 34.