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x in (-oo:+oo)
11*x < -11/3 // + -11/3
11*x-(-11/3) < 0
11*x+11/3 < 0
11*x+11/3 < 0 // - 11/3
11*x < -11/3 // : 11
x < -11/3/11
x < -1/3
x in (-oo:-1/3)
(-oo:-1/3)
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