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X in (-oo:+oo)
X/2 = 14/8 // - 14/8
X/2-(14/8) = 0
X/2-7/4 = 0
1/2*X-7/4 = 0 // + 7/4
1/2*X = 7/4 // : 1/2
X = 7/4/1/2
X = 7/2
X = 7/2
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