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t in (-oo:+oo)
3-(2*t)-(1/4) = 1/2 // - 1/2
3-(2*t)-(1/4)-(1/2) = 0
3-2*t-1/4-1/2 = 0
9/4-2*t = 0 // - 9/4
-2*t = -9/4 // : -2
t = -9/4/(-2)
t = 9/8
t = 9/8
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