What is the value of X in ( Math)
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The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol. See: Variable.
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In math, x is a common expression of a variable. Variables are symbols that represent an unknown value. For example, x + 3 = 5
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