n/2-1=2

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Solution for n/2-1=2 equation: 


n in (-oo:+oo)

n/2-1 = 2 // - 2

n/2-2-1 = 0

1/2*n-3 = 0 // + 3

1/2*n = 3 // : 1/2

n = 3/1/2

n = 6

n = 6

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