1/x+7/x=4

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


D( x )

x = 0

x = 0

x = 0

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

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

1/x+7/x-4 = 0

8*x^-1 = 4 // : 8

x^-1 = 1/2

-1 < 0

1/(x^1) = 1/2 // * x^1

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

2 = x^1

x = 2

x = 2

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