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x in (-oo:+oo)
(6*(x+6))/8 = 0.25 // - 0.25
(6*(x+6))/8-0.25 = 0
(6*(x+6))/8+(-0.25*8)/8 = 0
6*(x+6)-0.25*8 = 0
6*x+34 = 0
(6*x+34)/8 = 0
(6*x+34)/8 = 0 // * 8
6*x+34 = 0
6*x+34 = 0 // - 34
6*x = -34 // : 6
x = -34/6
x = -17/3
x = -17/3
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