7/x=21/30

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Solution for 7/x=21/30 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x = 21/30 // - 21/30

7/x-(21/30) = 0

7/x-7/10 = 0

7*x^-1 = 7/10 // : 7

x^-1 = 1/10

-1 < 0

1/(x^1) = 1/10 // * x^1

1 = 1/10*x^1 // : 1/10

10 = x^1

x = 10

x = 10

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