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