7/x-1/5=4

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Solution for 7/x-1/5=4 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x-(1/5) = 4 // - 4

7/x-(1/5)-4 = 0

7/x-1/5-4 = 0

7*x^-1 = 21/5 // : 7

x^-1 = 3/5

-1 < 0

1/(x^1) = 3/5 // * x^1

1 = 3/5*x^1 // : 3/5

5/3 = x^1

x = 5/3

x = 5/3

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