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t in (-oo:+oo)
5/8-4*t = 37/8 // - 37/8
5/8-4*t-(37/8) = 0
5/8-4*t-37/8 = 0
-4*t-4 = 0 // + 4
-4*t = 4 // : -4
t = 4/(-4)
t = -1
t = -1
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