SOLUTION: Problem Solving How many liters of a 20% solution should be added to a 450 L solution which contains 35% alcohol so that the resulting mixture will be 30% alcohol? With solution?

Question 1091799: Problem Solving
How many liters of a 20% solution should be added to a 450 L solution which contains 35% alcohol so that the resulting mixture will be 30% alcohol? With solution?

Found 2 solutions by jorel1380, josmiceli:
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Let n be the amount of 20% solution. Then:
0.2n + 0.35(450)=0.30(n+450)
0.1n=22.5
n=225 liters of 20% solution
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Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = liters of 20% solution needed

225 liters of 20% solution must be added
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check:

OK
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