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x in (-oo:+oo)
(1/2)*x-(1/8) = 1 // - 1
(1/2)*x-(1/8)-1 = 0
(1/2)*x-1/8-1 = 0
1/2*x-9/8 = 0 // + 9/8
1/2*x = 9/8 // : 1/2
x = 9/8/1/2
x = 9/4
x = 9/4
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