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X in (-oo:+oo)
(7/8)*X-(3/8) = 11/8 // - 11/8
(7/8)*X-(3/8)-(11/8) = 0
(7/8)*X-3/8-11/8 = 0
7/8*X-7/4 = 0 // + 7/4
7/8*X = 7/4 // : 7/8
X = 7/4/7/8
X = 2
X = 2
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