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t in (-oo:+oo)
t/4-8 = 4.5*t // - 4.5*t
t/4-(4.5*t)-8 = 0
t/4-4.5*t-8 = 0
-4.25*t-8 = 0 // + 8
-4.25*t = 8 // : -4.25
t = 8/(-4.25)
t = -1.88235294
t = -1.88235294
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