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asura asura
  • 25-10-2015
  • Mathematics
Answered

3/9=21/k proportion

Verified Answer :

TSO
TSO TSO
  • 25-10-2015

\(\frac{3}{9} = \frac{21}{k}\\\\\frac{1}{3}= \frac{21}{k}\\\\\sf Cross~multiply\\\\1(k) = 21(3)\\\\k = 21(3)\\\\\boxed{k = 63}\)

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