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x in (-oo:+oo)
-2*x = 1/4 // - 1/4
-2*x-(1/4) = 0
-2*x-1/4 = 0
-2*x-1/4 = 0 // + 1/4
-2*x = 1/4 // : -2
x = 1/4/(-2)
x = -1/8
x = -1/8
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