28/35=42/x

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Solution for 28/35=42/x equation: 


D( x )

x = 0

x = 0

x = 0

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

28/35 = 42/x // - 42/x

28/35-(42/x) = 0

28/35-42*x^-1 = 0

-42*x^-1 = -4/5 // : -42

x^-1 = 2/105

-1 < 0

1/(x^1) = 2/105 // * x^1

1 = 2/105*x^1 // : 2/105

105/2 = x^1

x = 105/2

x = 105/2

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