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\/(3) x -x=2-1
x(\/3 - 1)=1 / :(\/3 -1)
x= 1/ (\/3 -1)
uwalniajac mianownik od niewymiernosci rozszerzamy o (\/3 +1)
x=(\/3 +1) /(3-1)
x=(\/3 +1)/ 2