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9.4 #8

8. There are 1700 bottles of water arranged into 4 groups. The second group has 20 more bottles than the first group. The third group has twice as many bottles as the second group. The fourth group has 10 more bottles than the third group. How many bottles are in each group? Solve this problem in two ways: with the aid of a diagram and with algebraic equations. Explain both solu- tion methods, and discuss how they are related.

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