1/28=1/(7x)

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Solution for 1/28=1/(7x) equation: 


D( x )

7*x = 0

7*x = 0

7*x = 0

7*x = 0 // : 7

x = 0

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

1/28 = 1/(7*x) // - 1/(7*x)

1/28-(1/(7*x)) = 0

(-1/7)*x^-1+1/28 = 0

-1/7*x^-1 = -1/28 // : -1/7

x^-1 = 1/4

-1 < 0

1/(x^1) = 1/4 // * x^1

1 = 1/4*x^1 // : 1/4

4 = x^1

x = 4

x = 4

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