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X in (-oo:+oo)
X/3 = 4/2 // - 4/2
X/3-(4/2) = 0
X/3-2 = 0
1/3*X-2 = 0 // + 2
1/3*X = 2 // : 1/3
X = 2/1/3
X = 6
X = 6
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