4=5/u-8

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Solution for 4=5/u-8 equation: 


D( u )

u = 0

u = 0

u = 0

u in (-oo:0) U (0:+oo)

4 = 5/u-8 // - 5/u-8

4-(5/u)+8 = 0

4-5*u^-1+8 = 0

-5*u^-1 = -12 // : -5

u^-1 = 12/5

-1 < 0

1/(u^1) = 12/5 // * u^1

1 = 12/5*u^1 // : 12/5

5/12 = u^1

u = 5/12

u = 5/12

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