5/x+2/5=7/x

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Solution for 5/x+2/5=7/x equation: 


D( x )

x = 0

x = 0

x = 0

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

5/x+2/5 = 7/x // - 7/x

5/x-(7/x)+2/5 = 0

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

-2*x^-1 = -2/5 // : -2

x^-1 = 1/5

-1 < 0

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

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

5 = x^1

x = 5

x = 5

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