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Heather, David, and Austin served a total of 78 orders Monday at the school cafeteria. Austin served 2 times as many orders as Heather. David

Heather, David, and Austin served a total of 78 orders Monday at the school cafeteria. Austin served 2 times as many orders as Heather. David served 10 fewer orders than Heather. How many orders did they each serve? Number of orders Heather served: Number of orders David served: 0 0 X

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