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x in (-oo:+oo)
(2/3)*x-4 > -x/3-5 // + -x/3-5
(2/3)*x-(-x/3)-4+5 > 0
(2/3)*x+(1/3)*x-4+5 > 0
x+1 > 0 // - 1
x > -1
x in (-1:+oo)
(-1:+oo)
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