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1.1: Definition of Variable

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

Equation

An equation is a mathematical sentence that describes two equal quantities. Equations contain equals signs.

substitute

In algebra, to substitute means to replace a variable or term with a specific value.

Variable

A variable is a symbol used to represent an unknown or changing quantity. The most common variables are a, b, x, y, m, and n.

Variable Expression

A variable expression is a mathematical phrase that contains at least one variable or unknown quantity.

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Difficulty Level:
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Date Created:
Aug 13, 2012
Last Modified:
Aug 16, 2016
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MAT.ALG.140.L.1