89=4n+5n-1

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Solution for 89=4n+5n-1 equation: 


n in (-oo:+oo)

89 = 4*n+5*n-1 // - 4*n+5*n-1

1-(4*n)-(5*n)+89 = 0

1-4*n-5*n+89 = 0

90-9*n = 0 // - 90

-9*n = -90 // : -9

n = -90/(-9)

n = 10

n = 10

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