Question 1096495
The manager of a fish store has water that is 10% salt and the other water that is 25%. He needs to fill an aquarium with 10 gallons of water that is 20%. what is the answer?
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Depends on the question.
Here's a similar problem.
Same problem, different numbers, actually.
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A scientist mixes water (containing no salt) with a solution that contains 
 40% salt. She wants to obtain 200 ounces of a mixture that is 5% salt. How many ounces of water and how many ounces of the 40% salt solution should she use
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 W = Water
 S = 40% salt (if available)
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 W + S = 200
 W*0 + S*40 = (W+S)*5
 40S = 5W + 5S
 5W = 35S
 W = 200-S
 5(200-S) = 35S
 1000 - 5S = 35S
 40S = 1000
 S = 25