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x in (-oo:+oo)
4*x = 2/9 // - 2/9
4*x-(2/9) = 0
4*x-2/9 = 0
4*x-2/9 = 0 // + 2/9
4*x = 2/9 // : 4
x = 2/9/4
x = 1/18
x = 1/18
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