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x in (-oo:+oo)
(2/3)*(9-(3*x)) > -10 // + 10
(2/3)*(9-(3*x))+10 > 0
(2/3)*(9-3*x)+10 > 0
2/3*(9-3*x)+10 > 0
2/3*(9-3*x)+10 > 0
16-2*x > 0
16-2*x > 0
16-2*x > 0 // - 16
-2*x > -16 // : -2
x < -16/(-2)
x < 8
(-oo:8) (8:+oo) 16-2*x + -
x in (-oo:8)
(-oo:8)
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