what is the value of x
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x is an unknown quantity whose value is determined based on any algebraic equation it is used in. Solving an equation provides its numerical value. Although an unknown quantity can be represented by any alphabet of the English language, for convenience x is taken universally, when an equation works with one unknown value. For more than one, other alphabets are usually used as unknown representative values
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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!
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