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t in (-oo:+oo)
(1/4)*(9*t-9) = (11/4)*t-((t+9)/8) // - (11/4)*t-((t+9)/8)
(1/4)*(9*t-9)+(t+9)/8-((11/4)*t) = 0
(1/4)*(9*t-9)+(t+9)/8+(-11/4)*t = 0
1/4*(9*t-9)+(t+9)/8+(-11*t)/4 = 0
(1/4*4*8*(9*t-9))/(4*8)+(4*(t+9))/(4*8)+(-11*8*t)/(4*8) = 0
1/4*4*8*(9*t-9)+4*(t+9)-11*8*t = 0
76*t-88*t-36 = 0
-12*t-36 = 0
(-12*t-36)/(4*8) = 0
(-12*t-36)/(4*8) = 0 // * 4*8
-12*t-36 = 0
-12*t-36 = 0 // + 36
-12*t = 36 // : -12
t = 36/(-12)
t = -3
t = -3
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