7-n/7n

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Solution for 7-n/7n equation: 


n in (-oo:+oo)

7-((n/7)*n) = 0

(-1/7)*n^2+7 = 0

-1/7*n^2 = -7 // : -1/7

n^2 = 49

n^2 = 49 // ^ 1/2

abs(n) = 7

n = 7 or n = -7

n in { 7, -7 }

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