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n in (-oo:+oo)
5*n-(3/4) = 5*n+3/6 // - 5*n+3/6
5*n-(5*n)-(3/4)-(3/6) = 0
5*n-5*n-3/4-1/2 = 0
-5/4 = 0
n belongs to the empty set
n belongs to the empty set
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