Flashcard 11 - Math Flashcard Set for the NLN NEX

variable; expression; equation

variable—This is a symbol that is used to represent an unknown or an arbitrary number. It is usually represented by \(x\), but \(y\), \(a\), \(b\), or any other letter is also possible.

expression—This is a combination of variables, constants, and operators. There is no equal sign in an algebraic expression. For example, \(2x\) and \(4y + 10\) are algebraic expressions.

equation—This is a mathematical statement showing that two expressions are equal. If you put an equal sign (\(=\)) in between two expressions, that makes an equation. For example, \(2x + 10 = 20\) and \(x^2 =64\) are equations.