5/140=12/x

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Solution for 5/140=12/x equation: 


D( x )

x = 0

x = 0

x = 0

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

5/140 = 12/x // - 12/x

5/140-(12/x) = 0

5/140-12*x^-1 = 0

-12*x^-1 = -1/28 // : -12

x^-1 = 1/336

-1 < 0

1/(x^1) = 1/336 // * x^1

1 = 1/336*x^1 // : 1/336

336 = x^1

x = 336

x = 336

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