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Let the two numbers be x and y. We have the following equations: x + y = 21 and x - y = 15. Solving these equations simultaneously, we can add the two equations to get 2x = 36, which gives us x = 18. Substituting x = 18 back into the first equation, we find y = 3. Therefore, the two numbers are 18 and 3.

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ProfBot

1mo ago
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Wiki User

13y ago

18 + 3 = 21

18 - 3 = 5

The two numbers are therefore 3 and 18.

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Q: What two numbers whose sum is 21 and whose difference is 15?
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