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x in (-oo:+oo)
3*x = 9/11 // - 9/11
3*x-(9/11) = 0
3*x-9/11 = 0
3*x-9/11 = 0 // + 9/11
3*x = 9/11 // : 3
x = 9/11/3
x = 3/11
x = 3/11
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