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English definition of “x”

x

noun [U] (AMOUNT NOT STATED)    /eks/
used to represent a number , or the name of person or thing that is not known or stated : If 2x = 8, then x = 4. Witness x stated that she had seen Cooper on repeated occasions .Mathematical symbols
(Definition of x noun (AMOUNT NOT STATED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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