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X in (-oo:+oo)
X/11 = 13/8 // - 13/8
X/11-(13/8) = 0
X/11-13/8 = 0
1/11*X-13/8 = 0 // + 13/8
1/11*X = 13/8 // : 1/11
X = 13/8/1/11
X = 143/8
X = 143/8
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