12/40=18/x

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Solution for 12/40=18/x equation: 


D( x )

x = 0

x = 0

x = 0

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

12/40 = 18/x // - 18/x

12/40-(18/x) = 0

12/40-18*x^-1 = 0

-18*x^-1 = -3/10 // : -18

x^-1 = 1/60

-1 < 0

1/(x^1) = 1/60 // * x^1

1 = 1/60*x^1 // : 1/60

60 = x^1

x = 60

x = 60

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