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n in (-oo:+oo)
4.3/25.8 = (1/2)*n // - (1/2)*n
4.3/25.8-((1/2)*n) = 0
(-1/2)*n+4.3/25.8 = 0
0.16666667-1/2*n = 0 // - 0.16666667
-1/2*n = -0.16666667 // : -1/2
n = -0.16666667/(-1/2)
n = 0.33333334
n = 0.33333334
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