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What is a variable?
A symbol, usually a letter, that represents a quantity that can change.
What is an algebraic expression?
A mathematical statement that includes numbers, variables, and operations, but does not contain an equality sign ()).
What is an algebraic equation?
A mathematical statement that shows two expressions are equal, usually containing an equality sign ()).
What does it mean to "solve an equation"?
The process of finding the value(s) of the variable(s) that make an equation true.