N/20=-21 - solution

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Solution for N/20=-21 equation:

N in (-oo:+oo)

N/20 = -21 // + 21

N/20+21 = 0

1/20*N+21 = 0 // - 21

1/20*N = -21 // : 1/20

N = -21/1/20

N = -420

N = -420

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