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X in (-oo:+oo)
X/4 = 8/7 // - 8/7
X/4-(8/7) = 0
X/4-8/7 = 0
1/4*X-8/7 = 0 // + 8/7
1/4*X = 8/7 // : 1/4
X = 8/7/1/4
X = 32/7
X = 32/7
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