Grades 6, 7 and 8 - Math - Middle School - Algebra - Getting Started — Flashcards | Middle School | FatSkills

Grades 6, 7 and 8 - Math - Middle School - Algebra - Getting Started — Flashcards

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Algebra often substitutes letters for numbers.  Where we could put a number we put a letter instead. 

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Sam has x guinea pigs, Paul has y guinea pigs and Joseph has z guinea pigs. We know that Sam and Paul together have the same number of guinea pigs as Joseph. How would we write this?
x + y = z
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