35/5=81/x

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Solution for 35/5=81/x equation: 


D( x )

x = 0

x = 0

x = 0

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

35/5 = 81/x // - 81/x

35/5-(81/x) = 0

35/5-81*x^-1 = 0

-81*x^-1 = -7 // : -81

x^-1 = 7/81

-1 < 0

1/(x^1) = 7/81 // * x^1

1 = 7/81*x^1 // : 7/81

81/7 = x^1

x = 81/7

x = 81/7

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