7/2/11/2=21/x

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Solution for 7/2/11/2=21/x equation: 


D( x )

x = 0

x = 0

x = 0

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

((7/2)/11)/2 = 21/x // - 21/x

((7/2)/11)/2-(21/x) = 0

((7/2)/11)/2-21*x^-1 = 0

-21*x^-1 = -7/44 // : -21

x^-1 = 1/132

-1 < 0

1/(x^1) = 1/132 // * x^1

1 = 1/132*x^1 // : 1/132

132 = x^1

x = 132

x = 132

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