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X in (-oo:+oo)
X/8 = 7.3 // - 7.3
X/8-7.3 = 0
1/8*X-7.3 = 0 // + 7.3
1/8*X = 7.3 // : 1/8
X = 7.3/1/8
X = 58.4
X = 58.4
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