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x in (-oo:+oo)
(1/2)*x > 1 // - 1
(1/2)*x-1 > 0
1/2*x-1 > 0 // + 1
1/2*x > 1 // : 1/2
x > 1/1/2
x > 2
x in (2:+oo)
(2:+oo)
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