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What and what equals 19?

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Anonymous

7y ago
Updated: 10/17/2024

There are infinitely many possible answers. The answer depend on the operation:

  • Using addition: let A be any number less than or equal to 9.5 and let B = 19-A. Then A + B = A + (19-A) = 19. For each of the infinitely many choices for A, the pair (A, B) is different. So there are infinitely many additive answers.
  • Change the sign of B and then every pair A - B is a possible solution.
  • Let C be any number in the range [-sqrt(19), sqrt(19)] other than 0, and let D = 19/C. Then C*D = C * 19/C = 19. For each of the infinitely many choices of C, the pair (c, D) is unique. So there are infinitely many multiplicative solutions.
  • Replace D by 1/D and you will have infinitely many solutions such that C/D = 19.
  • Then there are many other operations.
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9y ago

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7y ago
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Q: What and what equals 19?
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