80/8=18/x

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Solution for 80/8=18/x equation: 


D( x )

x = 0

x = 0

x = 0

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

80/8 = 18/x // - 18/x

80/8-(18/x) = 0

80/8-18*x^-1 = 0

-18*x^-1 = -10 // : -18

x^-1 = 5/9

-1 < 0

1/(x^1) = 5/9 // * x^1

1 = 5/9*x^1 // : 5/9

9/5 = x^1

x = 9/5

x = 9/5

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