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x in (-oo:+oo)
9*x = 11/2 // - 11/2
9*x-(11/2) = 0
9*x-11/2 = 0
9*x-11/2 = 0 // + 11/2
9*x = 11/2 // : 9
x = 11/2/9
x = 11/18
x = 11/18
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