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x in (-oo:+oo)
2*x = 4/11 // - 4/11
2*x-(4/11) = 0
2*x-4/11 = 0
2*x-4/11 = 0 // + 4/11
2*x = 4/11 // : 2
x = 4/11/2
x = 2/11
x = 2/11
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