SOLUTION: How many liters of pure acid should be added to 6liters of 70% concentrate to raise it to 85%?

SOLUTION: How many liters of pure acid should be added to 6liters of 70% concentrate to raise it to 85%?

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Question 1041561: How many liters of pure acid should be added to 6liters of 70% concentrate to raise it to 85%?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How many liters of pure acid should be added to 6liters of 70% concentrate to raise it to 85%?
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Add A liters.
6*70 + A*100 = (6+A)*85
Solve for A
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