15/21=14/x

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Solution for 15/21=14/x equation: 


D( x )

x = 0

x = 0

x = 0

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

15/21 = 14/x // - 14/x

15/21-(14/x) = 0

15/21-14*x^-1 = 0

-14*x^-1 = -5/7 // : -14

x^-1 = 5/98

-1 < 0

1/(x^1) = 5/98 // * x^1

1 = 5/98*x^1 // : 5/98

98/5 = x^1

x = 98/5

x = 98/5

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