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x in (-oo:+oo)
T-(2/3) = 2*t-(7/6) // - 2*t-(7/6)
T-(2*t)-(2/3)+7/6 = 0
T-2*t-2/3+7/6 = 0
T-2*t+1/2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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