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x in (-oo:+oo)
19 < x/8 // - x/8
19-(x/8) < 0
19-1/8*x < 0 // - 19
-1/8*x < -19 // : -1/8
x > -19/(-1/8)
x > 152
x in (152:+oo)
(152:+oo)
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