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x in (-oo:+oo)
(-1/4)*x-(1/2) = 2 // - 2
(-1/4)*x-(1/2)-2 = 0
(-1/4)*x-1/2-2 = 0
-1/4*x-5/2 = 0 // + 5/2
-1/4*x = 5/2 // : -1/4
x = 5/2/(-1/4)
x = -10
x = -10
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