56/35=21/x

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Solution for 56/35=21/x equation: 


D( x )

x = 0

x = 0

x = 0

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

56/35 = 21/x // - 21/x

56/35-(21/x) = 0

56/35-21*x^-1 = 0

-21*x^-1 = -8/5 // : -21

x^-1 = 8/105

-1 < 0

1/(x^1) = 8/105 // * x^1

1 = 8/105*x^1 // : 8/105

105/8 = x^1

x = 105/8

x = 105/8

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