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x+30 - wiek taty
x+30+2=3(x+2)
x+32=3x+6
2x=26
x=13
13 lat
30+x-wiek ojca
3(x+2)=x+30+2
3x+6=x+32
2x=26 /:2
x=13
Odp. Autor wypowiedzi ma 13lat