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