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x in (-oo:+oo)
x-(2/9)-(1/1) = x-(5/8) // - x-(5/8)
x-x-(2/9)-(1/1)+5/8 = 0
x-x-2/9+5/8-1 = 0
-43/72 = 0
x belongs to the empty set
x belongs to the empty set
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