21-1/7n=5/7n

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Solution for 21-1/7n=5/7n equation: 


n in (-oo:+oo)

21-((1/7)*n) = (5/7)*n // - (5/7)*n

21-((1/7)*n)-((5/7)*n) = 0

(-1/7)*n+(-5/7)*n+21 = 0

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

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

n = -21/(-6/7)

n = 49/2

n = 49/2

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