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X in (-oo:+oo)
X/120 = 43/258 // - 43/258
X/120-(43/258) = 0
X/120-1/6 = 0
1/120*X-1/6 = 0 // + 1/6
1/120*X = 1/6 // : 1/120
X = 1/6/1/120
X = 20
X = 20
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