N/2-21=15

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Solution for N/2-21=15 equation: 


N in (-oo:+oo)

N/2-21 = 15 // - 15

N/2-21-15 = 0

1/2*N-36 = 0 // + 36

1/2*N = 36 // : 1/2

N = 36/1/2

N = 72

N = 72

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