SOLUTION: A chemical storeroom has a 90% acid solution and a 40% acid solution. How many liters of the 90% solution should be added to 50 liters of the 40% solution to yield a 50% solution?

Question 813526: A chemical storeroom has a 90% acid solution and a 40% acid solution. How many liters of the 90% solution should be added to 50 liters of the 40% solution to yield a 50% solution?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A chemical storeroom has a 90% acid solution and a 40% acid solution. How many liters of the 90% solution should be added to 50 liters of the 40% solution to yield a 50% solution?
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let x =amount of the 90% solution should be added
..
90%x+40%*50=50%(x+50)
0.90x+20=0.50x+25
0.40x=5
x=12.5
amount of the 90% solution should be added=12.5 liters
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