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x in (-oo:+oo)
(2/3)*x-6 > -2 // + 2
(2/3)*x-6+2 > 0
2/3*x-4 > 0 // + 4
2/3*x > 4 // : 2/3
x > 4/2/3
x > 6
x in (6:+oo)
(6:+oo)
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