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t in (-oo:+oo)
(4/7)*t+4 = 296/77 // - 296/77
(4/7)*t-(296/77)+4 = 0
(4/7)*t-296/77+4 = 0
4/7*t+12/77 = 0 // - 12/77
4/7*t = -12/77 // : 4/7
t = -12/77/4/7
t = -3/11
t = -3/11
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