4/x+5/x-1=7

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


D( x )

x = 0

x = 0

x = 0

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

4/x+5/x-1 = 7 // - 7

4/x+5/x-7-1 = 0

9*x^-1 = 8 // : 9

x^-1 = 8/9

-1 < 0

1/(x^1) = 8/9 // * x^1

1 = 8/9*x^1 // : 8/9

9/8 = x^1

x = 9/8

x = 9/8

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