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x in (-oo:+oo)
(4/5)*x-2 < 14 // - 14
(4/5)*x-14-2 < 0
4/5*x-16 < 0 // + 16
4/5*x < 16 // : 4/5
x < 16/4/5
x < 20
x in (-oo:20)
(-oo:20)
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