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N in (-oo:+oo)
5*N = 8.1/3 // - 8.1/3
5*N-(8.1/3) = 0
5*N-2.7 = 0
5*N-2.7 = 0 // + 2.7
5*N = 2.7 // : 5
N = 2.7/5
N = 0.54
N = 0.54
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