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Alpha Teach Yourself Algebra I in 24 Hours by Jane Cook

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Hour 5
Linear Equations: Solving with Basic Operations
If one process sets algebra apart from basic arithmetic, it is solving equations. During your first four hours of study, you learned about many properties and rules that serve as the foundation of algebraic knowledge. This hour, you will learn about four more properties that, when applied to the others, give you the tools to solve equations.

Solving Equations with Addition and Subtraction

You know that an equation is simply two expressions that are equal to each other, and the equality is shown with an equals sign. Basic equations are like 2 + 3 = 5 or -6 + 9 = 3. These equations are basic because they don’t include any variables. If you add 2 and 3, the answer is 5. If you add -6 ...

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