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t in (-oo:+oo)
5*t-((3/4)*t)+1/8 = 143/56 // - 143/56
5*t-((3/4)*t)+1/8-(143/56) = 0
5*t+(-3/4)*t+1/8-143/56 = 0
17/4*t-17/7 = 0 // + 17/7
17/4*t = 17/7 // : 17/4
t = 17/7/17/4
t = 4/7
t = 4/7
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