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x in (-oo:+oo)
(2/3)*x-5 > 3 // - 3
(2/3)*x-5-3 > 0
2/3*x-8 > 0 // + 8
2/3*x > 8 // : 2/3
x > 8/2/3
x > 12
x in (12:+oo)
(12:+oo)
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