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x in (-oo:+oo)
(3*x)/8 < 24 // - 24
(3*x)/8-24 < 0
3/8*x-24 < 0 // + 24
3/8*x < 24 // : 3/8
x < 24/3/8
x < 64
x in (-oo:64)
(-oo:64)
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