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t in (-oo:+oo)
35 = 4*t-7*t-1 // - 4*t-7*t-1
1-(-7*t)-(4*t)+35 = 0
7*t-4*t+1+35 = 0
3*t+36 = 0 // - 36
3*t = -36 // : 3
t = -36/3
t = -12
t = -12
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