3/7=21/t

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Solution for 3/7=21/t equation: 


D( t )

t = 0

t = 0

t = 0

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

3/7 = 21/t // - 21/t

3/7-(21/t) = 0

3/7-21*t^-1 = 0

-21*t^-1 = -3/7 // : -21

t^-1 = 1/49

-1 < 0

1/(t^1) = 1/49 // * t^1

1 = 1/49*t^1 // : 1/49

49 = t^1

t = 49

t = 49

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