SOLUTION: A 10% chlorine solution is to be mixed with a 25% chlorine solution to obtain 30 gallons of 20% solution. How many gallons of each must be used?

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Question 721125: A 10% chlorine solution is to be mixed with a 25% chlorine solution
to obtain 30 gallons of 20% solution. How many gallons of each must be used?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A 10% chlorine solution is to be mixed with a 25% chlorine solution
to obtain 30 gallons of 20% solution. How many gallons of each must be used?
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Equation:
chlor + chlor = chlor
0.10x + 0.25(30-x) = 0.20*30
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10x + 25*30 - 25x = 20*30
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-15x = -5*30
x = 10 gallons (amt. of 10% solution needed)
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30-x = 20 gallons (amt. of 25% solution needed)
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Cheers,
Stan H.
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