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x in (-oo:+oo)
8 = (-1/4)*x // - (-1/4)*x
8-((-1/4)*x) = 0
(1/4)*x+8 = 0
1/4*x+8 = 0 // - 8
1/4*x = -8 // : 1/4
x = -8/1/4
x = -32
x = -32
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