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X in (-oo:+oo)
X/5-2 > -9 // + 9
X/5-2+9 > 0
1/5*X+7 > 0 // - 7
1/5*X > -7 // : 1/5
X > -7/1/5
X > -35
X in (-35:+oo)
(-35:+oo)
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