21/80=(7/8)n

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Solution for 21/80=(7/8)n equation: 


n in (-oo:+oo)

21/80 = (7/8)*n // - (7/8)*n

21/80-((7/8)*n) = 0

(-7/8)*n+21/80 = 0

21/80-7/8*n = 0 // - 21/80

-7/8*n = -21/80 // : -7/8

n = -21/80/(-7/8)

n = 3/10

n = 3/10

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