16 decreased by 3 times the sum of 3 and a number

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16 decreased by 3 times the sum of 3 and a number

Take this algebraic expression in parts:

  • The phrase a number means an arbitrary variable. Let's call it x.
  • The sum of 3 and a number: 3 + x
  • 3 times the sum: 3(3 + x)
  • 16 decreased by... means we subtract 3(3 + x) from 16

3(3 + x) from 16

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