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Bartek+Ola=18 lat
Kamil + Bartek=16 lat
I
(14+18+16):2=48:2=24
24-14=10- tyle lat ma Bartek
24-18=6 -- tyle lat ma Kamil
24-16=8 -- tyle lat ma Ola
Odp.: Bartek ma 10 lat, Kamil 6 lat, a Ola 8 lat.