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x in (-oo:+oo)
1-x = (-5/6)*x-(1/2) // - (-5/6)*x-(1/2)
1/2-x-((-5/6)*x)+1 = 0
(5/6)*x-x+1/2+1 = 0
3/2-1/6*x = 0 // - 3/2
-1/6*x = -3/2 // : -1/6
x = -3/2/(-1/6)
x = 9
x = 9
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