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X in (-oo:+oo)
3*X-1 = X/2 // - X/2
3*X-(X/2)-1 = 0
5/2*X-1 = 0 // + 1
5/2*X = 1 // : 5/2
X = 1/5/2
X = 2/5
X = 2/5
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