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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)-((11/4)*t)+t+9/8 = 0
(1/4)*(9*t-9)+(-11/4)*t+t+9/8 = 0
1/4*(9*t-9)+(-11*t)/4+t+9/8 = 0
(1/4*4*8*(9*t-9))/(4*8)+(-11*8*t)/(4*8)+(4*8*t)/(4*8)+(4*9)/(4*8) = 0
1/4*4*8*(9*t-9)-11*8*t+4*8*t+4*9 = 0
32*t-16*t-72+36 = 0
16*t-72+36 = 0
16*t-36 = 0
(16*t-36)/(4*8) = 0
(16*t-36)/(4*8) = 0 // * 4*8
16*t-36 = 0
16*t-36 = 0 // + 36
16*t = 36 // : 16
t = 36/16
t = 9/4
t = 9/4
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