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N in (-oo:+oo)
N/19 = 5.1/2 // - 5.1/2
N/19-(5.1/2) = 0
N/19-2.55 = 0
1/19*N-2.55 = 0 // + 2.55
1/19*N = 2.55 // : 1/19
N = 2.55/1/19
N = 48.44999903
N = 48.44999903
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