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x in (-oo:+oo)
14/11 = 7*x // - 7*x
14/11-(7*x) = 0
14/11-7*x = 0
14/11-7*x = 0 // - 14/11
-7*x = -14/11 // : -7
x = -14/11/(-7)
x = 2/11
x = 2/11
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