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x in (-oo:+oo)
3*x-(1/8) = 3*x-3/8 // - 3*x-3/8
3*x-(3*x)-(1/8)-(-3/8) = 0
3*x-3*x-1/8+3/8 = 0
1/4 = 0
x belongs to the empty set
x belongs to the empty set
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