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o-ojciec
s-syn
o=s+28
o-2=3(s-2)
o=s+28
s+28-2=3s-6
o=s+28
-2s=-32 /:(-2)
o=s+28
s=16
o=16+28
s=16
o=44
s=16
Ojciec ma 44 lat, syn 16.
x+28 wiek ojca
x+28-2=3(x-2)
x+26=3x-6
2x=32
x=16 wiek syna
wiek ojca 16+28=44