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y - wiek ojca teraz
y = 2x
x - 3 + y -3 = 57 stąd x + y = 63
x + y = 63
x + 2x = 63
3x = 63
x = 21 lat
y = 2x = 2*21 = 42 lata
x=yx2+3+3
yx2+x=63
x=63:3
x=21
myślę że pomoglem