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x in (-oo:+oo)
293*x = 30/100 // - 30/100
293*x-(30/100) = 0
293*x-3/10 = 0
293*x-3/10 = 0 // + 3/10
293*x = 3/10 // : 293
x = 3/10/293
x = 3/2930
x = 3/2930
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