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t in (-oo:+oo)
3/4-(5*t) = 5/12 // - 5/12
3/4-(5*t)-(5/12) = 0
3/4-5*t-5/12 = 0
1/3-5*t = 0 // - 1/3
-5*t = -1/3 // : -5
t = -1/3/(-5)
t = 1/15
t = 1/15
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