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### Variables and Expressions (for Holt Algebra 1, Lesson 1-1)

Grouping symbols may be used when translating from words to math. The product of 6 ... Solving Systems by Substitution (for Holt Algebra 1, Lesson 6-2) Sometimes it ...

http://go.hrw.com/resources/go_mt/alg1/alg1refresher.pdf