5/7n-4/7n+8=9

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Solution for 5/7n-4/7n+8=9 equation: 


n in (-oo:+oo)

(5/7)*n-((4/7)*n)+8 = 9 // - 9

(5/7)*n-((4/7)*n)-9+8 = 0

(5/7)*n+(-4/7)*n-9+8 = 0

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

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

n = 1/1/7

n = 7

n = 7

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