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Twenty pounds of a salt-water solution contains fifteen percent salt. How much water must be added to weaken the solution to twelve percent salt?


3 lb

5 lb

12 lb

Verified Answer :

irspow

(.15(20))/(20+w)=.12

3/(20+w)=.12

20+w=25

w=5

So 5 pounds of water must be added to the solution.


lexih525

Answer:

5

Step-by-step explanation:

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