Substitution, Expression, & Definition



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Substitution, Expression, & DefinitionSubstitution: Substitution refers to the act of replacing or exchanging one element or value with another. In the context of language and mathematics, substitution involves replacing a variable, symbol, or term with another of equal value or meaning. For example, in the expression "2x + 5," if we substitute the variable x with the value 3, we get "2(3) + 5," which simplifies to 11.

Expression: In general, an expression is a combination of symbols, variables, numbers, and operations that represents a particular mathematical or logical computation. It may contain constants, variables, and operators. Expressions can be as simple as a single number or variable or more complex, involving multiple terms and operations. For example, "3x + 2y - 7" is a mathematical expression containing variables (x and y), coefficients (3 and 2), and arithmetic operations (+ and -).

Definition: A definition is a statement or explanation that describes the meaning, nature, or essential qualities of a word, concept, term, or object. It provides clarity and understanding by establishing the boundaries and characteristics of what is being defined. Definitions can be found in dictionaries and encyclopedias and are used to convey precise meanings. They can be formal or informal and may vary depending on the context. A definition often includes essential attributes or properties that distinguish the term or concept from others.