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X in (-oo:+oo)
X/0.2 < -3.2 // + 3.2
X/0.2+3.2 < 0
5*X+3.2 < 0 // - 3.2
5*X < -3.2 // : 5
X < -3.2/5
X < -0.64
X in (-oo:-0.64)
(-oo:-0.64)
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