the__ stands for an unknown number
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In algebra, symbols (usually letters) are used to represent numbers. To solve math problems, you should know what variables and constants are. ... A variable is a letter or symbol used as a placeholder for an unknown value.
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In algebra, symbols (usually letters) are used to represent numbers. To solve math problems, you should know what variables and constants are. ... A variable is a letter or symbol used as a placeholder for an unknown value.
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