5/1+4/x=y

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Solution for 5/1+4/x=y equation: 


D( x )

x = 0

x = 0

x = 0

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

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

4/x-y+5/1 = 0

4/x-y+5 = 0

4*x^-1 = -(5-y) // : 4

x^-1 = (y-5)/4

-1 < 0

1/(x^1) = (y-5)/4 // * x^1

1 = x^1*((y-5)/4) // : (y-5)/4

4*(y-5)^-1 = x^1

x = 4*(y-5)^-1

x = 4*(y-5)^-1

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