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Ostrich Llama Count

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Author: Suzanne Alejandre
Description: teacher support active problem Pre-Algebra, difficulty level 2. Given the combined number of heads and legs of ostriches and llamas, help Raul and Esteban figure out how many ostriches and how many llamas there are.
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Problem page: http://mathforum.org/librarypow/puzzles/index2.ehtml?puzzle=2744
Support page: http://mathforum.org/pow/support/prealg/llama.teacher.html
Solution page: Problem #2744

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