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x in (-oo:+oo)
(2/3)*(2*x-1) < -14 // + 14
(2/3)*(2*x-1)+14 < 0
2/3*(2*x-1)+14 < 0
2/3*(2*x-1)+14 < 0
4/3*x+40/3 < 0
4/3*x+40/3 < 0
4/3*x+40/3 < 0 // - 40/3
4/3*x < -40/3 // : 4/3
x < -40/3/4/3
x < -10
(-oo:-10) (-10:+oo) 4/3*x+40/3 - +
x in (-oo:-10)
(-oo:-10)
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