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Mathematics 9 Online
OpenStudy (anonymous):

Professor Baker wants to mix a solution containing 15% acid with one containing 20% acid to obtain a 25-ounce solution containing 16% acid. How many ounces of the 15% solution should the professor use?

OpenStudy (aroub):

Oh, you subtracted! Why?

OpenStudy (aroub):

|dw:1333128487664:dw| :)

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