21/42=n/6

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Solution for 21/42=n/6 equation: 


n in (-oo:+oo)

21/42 = n/6 // - n/6

21/42-(n/6) = 0

1/2-1/6*n = 0 // - 1/2

-1/6*n = -1/2 // : -1/6

n = -1/2/(-1/6)

n = 3

n = 3

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