SOLUTION: A large tank contains 100 gallons of pure water. How many gallons of a saline solution containing 25% salt must be added to obtain a solution that has 10% salt ?

Question 265843: A large tank contains 100 gallons of pure water. How many gallons of a saline solution containing 25% salt must be added to obtain a solution that has 10% salt ?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A large tank contains 100 gallons of pure water. How many gallons of a saline solution containing 25% salt must be added to obtain a solution that has 10% salt ?
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Equation:
salt + salt = salt
0*100 + 0.25x = 0.10(x+100)
Multiply thru by 100 and solve for "x"
0 + 25x = 10x + 1000
15x = 1000
x = 66 2/3 gallons of 25% saline solution must be add
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Cheers,
Stan H.
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