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Why is the symbol “x” used in Mathematics to denote the unknown?


There are 25 other letters in the English alphabet. Then why was x particularly selected for this purpose?

 

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MickS says

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Paula (fpherj48) says

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    MickS 4 years ago

    Yes, rather like 2+2. The answer =4. No it isn't, is, it =2+2, but has an element of fourness about it.

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portables says

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