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Q&A #17531

Teachers' Lounge Discussion: math fluency

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From: Cody <cody.keeton@gmail.com>
To: Teacher2Teacher Public Discussion
Date: 2008100909:44:41
Subject: Can i get a formula

	
Jerry is experimenting with chemicals in the laboratory. He mixes a
solution that is 10% acid with a solution that is 30% acid. How much
of the 10% acid solution will be needed to make 40 liters of a
solution that is 25% acid?

can i get a formula please i forgot how to do this

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