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Elementary Algebra

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Introduction
Algebra
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Variable
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Coefficient
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Algebraic Expression
Combining like Terms
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Subtracting Variables
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Adding and Subtracting Unlike Terms
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Multiplying Numbers by Coefficients
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Combining Variables with Exponents

How Do You Combine Variables with Exponents?

Expressions that contain variables with different exponents can't be added together or subtracted from each other. Learn why that is the case in this video.

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    Practice identifying like terms on the next page.

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    Replacing a Variable with a Number
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