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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