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x in (-oo:+oo)
4*(-4*x-2) = -136 // + 136
4*(-4*x-2)+136 = 0
4*(-4*x-2)+136 = 0
128-16*x = 0
128-16*x = 0
128-16*x = 0 // - 128
-16*x = -128 // : -16
x = -128/(-16)
x = 8
x = 8
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