7/x=18/21

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Solution for 7/x=18/21 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x = 18/21 // - 18/21

7/x-(18/21) = 0

7/x-6/7 = 0

7*x^-1 = 6/7 // : 7

x^-1 = 6/49

-1 < 0

1/(x^1) = 6/49 // * x^1

1 = 6/49*x^1 // : 6/49

49/6 = x^1

x = 49/6

x = 49/6

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