27/10=40/x

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Solution for 27/10=40/x equation: 


D( x )

x = 0

x = 0

x = 0

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

27/10 = 40/x // - 40/x

27/10-(40/x) = 0

27/10-40*x^-1 = 0

-40*x^-1 = -27/10 // : -40

x^-1 = 27/400

-1 < 0

1/(x^1) = 27/400 // * x^1

1 = 27/400*x^1 // : 27/400

400/27 = x^1

x = 400/27

x = 400/27

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