n/7=12/21

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Solution for n/7=12/21 equation: 


n in (-oo:+oo)

n/7 = 12/21 // - 12/21

n/7-(12/21) = 0

n/7-4/7 = 0

1/7*n-4/7 = 0 // + 4/7

1/7*n = 4/7 // : 1/7

n = 4/7/1/7

n = 4

n = 4

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