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x in (-oo:+oo)
T+2*t+1/2-(3/3) = 10 // - 10
T+2*t+1/2-(3/3)-10 = 0
T+2*t+1/2-10-1 = 0
T+2*t-21/2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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