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x in (-oo:+oo)
(2/9)*x-2 < -4 // + 4
(2/9)*x-2+4 < 0
2/9*x+2 < 0 // - 2
2/9*x < -2 // : 2/9
x < -2/2/9
x < -9
x in (-oo:-9)
(-oo:-9)
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