n/7=21

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Solution for n/7=21 equation: 


n in (-oo:+oo)

n/7 = 21 // - 21

n/7-21 = 0

1/7*n-21 = 0 // + 21

1/7*n = 21 // : 1/7

n = 21/1/7

n = 147

n = 147

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