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x in (-oo:+oo)
(-10/3)*x > -12 // + 12
(-10/3)*x+12 > 0
12-10/3*x > 0 // - 12
-10/3*x > -12 // : -10/3
x < -12/(-10/3)
x < 18/5
x in (-oo:18/5)
(-oo:18/5)
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