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\/(1 7/9)=\/(16/9)=4/3
(-3)^{-1}=(-1/3)
x
zatem
[4/3+(-1/3)+x] /3 = 3
(1+x) : 3= 3 /*3
1+x=9
x=9-1
x=8
odp b)
x równe jest 8. Odpowiedź B.