SOLUTION: how many gal. of a 65% saline solution must be mixed with 8gal. of pure water to make a 25% solution ?

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Question 406512: how many gal. of a 65% saline solution must be mixed with 8gal. of pure water to make a 25% solution ?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how many gal. of a 65% saline solution must be mixed with 8gal. of pure water to make a 25% solution ?
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Equation:
salt + salt = salt
0.65x + 0*8 = 0.25(x+8)
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Multiply thru by 100 to get:
65x + 0 = 25x + 25*8
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40x = 25*8
x = (1/5)(25
x = 5 gallons (amt. of 65% solution needed)
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Cheers,
Stan H.