In mathematics and formal logic, the symbol combination <_ or less than or equal to indicates that a specific numerical quantity or variable is either strictly less than or exactly equal to another value. For example, writing x less than or equal to 5 means that any valid number for x can be 5, 4, 3, or any negative number, but cannot be 6 or higher. This relational operator is widely used in inequalities, domain constraints, programming logic, and algebraic problem-solving.
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