1-9/(7x)=5/2

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Solution for 1-9/(7x)=5/2 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-(9/(7*x)) = 5/2 // - 5/2

1-(9/(7*x))-(5/2) = 0

(-9/7)*x^-1-5/2+1 = 0

-9/7*x^-1 = 3/2 // : -9/7

x^-1 = -7/6

-1 < 0

1/(x^1) = -7/6 // * x^1

1 = -7/6*x^1 // : -7/6

-6/7 = x^1

x = -6/7

x = -6/7

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