n/9=21

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Solution for n/9=21 equation: 


n in (-oo:+oo)

n/9 = 21 // - 21

n/9-21 = 0

1/9*n-21 = 0 // + 21

1/9*n = 21 // : 1/9

n = 21/1/9

n = 189

n = 189

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