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t in (-oo:+oo)
7*t+t+5 = 103/11 // - 103/11
7*t+t-(103/11)+5 = 0
7*t+t-103/11+5 = 0
8*t-48/11 = 0 // + 48/11
8*t = 48/11 // : 8
t = 48/11/8
t = 6/11
t = 6/11
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