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x in (-oo:+oo)
0.3 = 0.35*x^(2/3) // - 0.35*x^(2/3)
0.3-(0.35*x^(2/3)) = 0
0.3-0.35*x^(2/3) = 0
-0.35*x^(2/3) = -0.3 // : -0.35
x^(2/3) = 0.85714286
( 0.85714286 < 0 i 2/3 in (0:1) ) => x naleu017Cy do O
x belongs to the empty set
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