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x in (-oo:+oo)
(2/5)*x < -32 // + 32
(2/5)*x+32 < 0
2/5*x+32 < 0 // - 32
2/5*x < -32 // : 2/5
x < -32/2/5
x < -80
x in (-oo:-80)
(-oo:-80)
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