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x in (-oo:+oo)
4*x = 9/2.3 // - 9/2.3
4*x-(9/2.3) = 0
4*x-3.91304348 = 0
4*x-3.91304348 = 0 // + 3.91304348
4*x = 3.91304348 // : 4
x = 3.91304348/4
x = 0.97826087
x = 0.97826087
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