6/7=n/21

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Solution for 6/7=n/21 equation: 


n in (-oo:+oo)

6/7 = n/21 // - n/21

6/7-(n/21) = 0

6/7-1/21*n = 0 // - 6/7

-1/21*n = -6/7 // : -1/21

n = -6/7/(-1/21)

n = 18

n = 18

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