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x in (-oo:+oo)
3*x-(4/4)-3 <= 4*x-(5/3) // - 4*x-(5/3)
3*x-(4*x)-(4/4)+5/3-3 <= 0
3*x-4*x+5/3-3-1 <= 0
-x-7/3 <= 0
-x <= 7/3 // * -1
x >= -7/3
x in <-7/3:+oo)
<-7/3:+oo)
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