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x in (-oo:+oo)
2*x-(2/6) > 9 // - 9
2*x-(2/6)-9 > 0
2*x-1/3-9 > 0
2*x-28/3 > 0 // + 28/3
2*x > 28/3 // : 2
x > 28/3/2
x > 14/3
x in (14/3:+oo)
(14/3:+oo)
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