<PRE><B>Question 946574</B>
How many gallons of a 50% saltwater solution must be added to 10 gallons of a 15% solution to obtain a 35% solution?
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Equation:
salt + salt = salt
0.50x + 0.15*10 = 0.35(x+10)
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50x + 15*10 = 35x + 35*10
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15x = 20*10
x = 200/15
x = 13 1/3 gallons (amt. of 50% solution needed)
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Cheers,
Stan H.
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