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SS90
SS90 SS90
  • 04-11-2015
  • Mathematics
Answered

The sum of 21 and a number is 30

Verified Answer :

Percy2Chase
Percy2Chase Percy2Chase
  • 04-11-2015

The answer is 9, because you subtract 21 from 30 and you get 9. When you add 21+9 you get 30.

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