2/3=7/c

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Solution for 2/3=7/c equation: 


D( c )

c = 0

c = 0

c = 0

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

2/3 = 7/c // - 7/c

2/3-(7/c) = 0

2/3-7*c^-1 = 0

-7*c^-1 = -2/3 // : -7

c^-1 = 2/21

-1 < 0

1/(c^1) = 2/21 // * c^1

1 = 2/21*c^1 // : 2/21

21/2 = c^1

c = 21/2

c = 21/2

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