variable, a letter that stands for an unknown number, substitute, to replace one thing with another, expression, a group of numbers, variables, and/or operation symbols that represents a mathematical relationship, simplify, to write an equivalent expression by combining like terms, terms, part of an expression that can be a number, a variable, or a product of both, constant, a number without a variable, evaluate, to find the value of an expression, coefficient, a number that is multiplied by a variable, equivalent expressions, expressions that are equal for all values of the variables, expand, to remove the parentheses by using the distributive property to multiply each term inside by the term on the outside, factor, to rewrite an expression as a product of its individual factors, equation , a mathematical statement that use an equal sign to show that two expression have the same value.

Algebra

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