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AoPS Online Books

Much of AoPS's curriculum, specifically designed for high-performing math students in grades 5-12, is now available online!

Our online books offer the same content as our print books. The online books work directly in your web browser: there is no additional software to download. (Students must be signed onto the AoPS website to access an online book.) Students will have immediate access to the online book upon purchase: no waiting for a print book to be shipped.

Schools: Please contact us at for institutional licensing.

View a sample:

Prealgebra Chapter 5, Section 3: Solving Linear Equations II

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