1/2n-9=4n+5

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Solution for 1/2n-9=4n+5 equation: 


n in (-oo:+oo)

(1/2)*n-9 = 4*n+5 // - 4*n+5

(1/2)*n-(4*n)-9-5 = 0

(1/2)*n-4*n-9-5 = 0

-7/2*n-14 = 0 // + 14

-7/2*n = 14 // : -7/2

n = 14/(-7/2)

n = -4

n = -4

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