SOLUTION: Macy wants to change 18 quarts of an 8% solution of ammonia to a 6% solution by adding pure water. How much pure water must she add?

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Question 917243: Macy wants to change 18 quarts of an 8% solution of ammonia to a 6% solution by adding pure water. How much pure water must she add?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Macy wants to change 18 quarts of an 8% solution of ammonia to a 6% solution by adding pure water. How much pure water must she add?
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Equation:
water + water = water
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0.92*18 + 1*x = 0.94(18+x)
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92*18 + 100x = 94*18 + 94x
6x = 2*18
x = 6 qts (amt. of pure water to add)
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Cheers,
Stan H.
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