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x in (-oo:+oo)
5*k = 3*t-((3*k)/t) // - 3*t-((3*k)/t)
5*k-(3*t)+(3*k)/t = 0
5*k-3*t+(3*k)/t = 0
5*k+3*k*t^-1-3*t = 0
x naleu017Cy do R
x in (-oo:+oo)
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