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X in (-oo:+oo)
3*X-X-2 = X/10-(8/5) // - X/10-(8/5)
3*X-X-(X/10)+8/5-2 = 0
19/10*X-2/5 = 0 // + 2/5
19/10*X = 2/5 // : 19/10
X = 2/5/19/10
X = 4/19
X = 4/19
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