# 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 ?

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 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(57224)   (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 ? -------------------------------------- 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 ===================== Cheers, Stan H.