Math Solutions

[Solution] Adjusting antifreeze: Angela needs 20 quarts of 50% antifreeze solution in its radiator. She plans to obtain this by mixing some pure antifreeze

Question: Adjusting antifreeze: Angela needs 20 quarts of 50% antifreeze solution in its radiator. She plans to obtain this by mixing some pure antifreeze with an appropriate amount of a 40% antifreeze solution. How many quarts of each should she use.

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