12/x=28/21

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Solution for 12/x=28/21 equation: 


D( x )

x = 0

x = 0

x = 0

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

12/x = 28/21 // - 28/21

12/x-(28/21) = 0

12/x-4/3 = 0

12*x^-1 = 4/3 // : 12

x^-1 = 1/9

-1 < 0

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

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

9 = x^1

x = 9

x = 9

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