-28/x=-4

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Solution for -28/x=-4 equation: 


D( x )

x = 0

x = 0

x = 0

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

-28/x = -4 // + 4

4-28/x = 0

-28*x^-1 = -4 // : -28

x^-1 = 1/7

-1 < 0

1/(x^1) = 1/7 // * x^1

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

7 = x^1

x = 7

x = 7

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