SOLUTION: We tried using a sample on the site, but we keep getting a negative answer! Help! How many kilograms of pure salt must be added to 20 kilograms of a 10% salt solution to obtain a

SOLUTION: We tried using a sample on the site, but we keep getting a negative answer! Help! How many kilograms of pure salt must be added to 20 kilograms of a 10% salt solution to obtain a

Algebra.Com

Question 25657: We tried using a sample on the site, but we keep getting a negative answer! Help!
How many kilograms of pure salt must be added to 20 kilograms of a 10% salt solution to obtain a 25% salt solution?
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
20(10)=25(20-x)
200=500-25x
-25x=-300
x=12

Hence, about 12 kilograms of solution must be added.
Paul.
RELATED QUESTIONS
3. How many kilograms of pure salt must be added to 7 kg of a 30% salt solution in order (answered by ewatrrr)

how many kilograms of pure salt must be added to 20 kilograms of a 10 percent salt... (answered by checkley71)

How many kilograms of pure salt must be added to 7 kg of a 30% salt solution in order to... (answered by mananth)

How many liters of pure water must be added to 40 liters of a 30% alcohol solution to... (answered by josmiceli)

Please help me answer this question: how many milliliters of pure water must be added to... (answered by jorel1380)

There are 20 kilograms of a solution that is 10% salt. How many kilograms of salt must be (answered by stanbon,Nate)

How many kilograms of salt must be added to 24 kg of a 20% salt solution in order to... (answered by ewatrrr)

How many ounces of pure salt must be added to 9oz of 5% salt solution to produce a 15%... (answered by stanbon)

A solution of salt and water contains 18 ounces of pure salt and 36 ounces of water. How (answered by nerdybill,NaturalBornNerd)