20/35=21/x

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Solution for 20/35=21/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/35 = 21/x // - 21/x

20/35-(21/x) = 0

20/35-21*x^-1 = 0

-21*x^-1 = -4/7 // : -21

x^-1 = 4/147

-1 < 0

1/(x^1) = 4/147 // * x^1

1 = 4/147*x^1 // : 4/147

147/4 = x^1

x = 147/4

x = 147/4

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