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X in (-oo:+oo)
X/72 = 5/8 // - 5/8
X/72-(5/8) = 0
X/72-5/8 = 0
1/72*X-5/8 = 0 // + 5/8
1/72*X = 5/8 // : 1/72
X = 5/8/1/72
X = 45
X = 45
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