7/x-4=42/12

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Solution for 7/x-4=42/12 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x-4 = 42/12 // - 42/12

7/x-(42/12)-4 = 0

7/x-7/2-4 = 0

7*x^-1 = 15/2 // : 7

x^-1 = 15/14

-1 < 0

1/(x^1) = 15/14 // * x^1

1 = 15/14*x^1 // : 15/14

14/15 = x^1

x = 14/15

x = 14/15

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