SOLUTION: Katy needs to mix a 10% alcohol solution with 140 milliliters of a 60% alcohol solution to create a 45% solution. How many millileters of 10% alcohol solution must Katy use? And Ho

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Question 800425: Katy needs to mix a 10% alcohol solution with 140 milliliters of a 60% alcohol solution to create a 45% solution. How many millileters of 10% alcohol solution must Katy use? And How much alcohol is in the 45% solution?
Answer by lwsshak3(11628) About Me  (Show Source):
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Katy needs to mix a 10% alcohol solution with 140 milliliters of a 60% alcohol solution to create a 45% solution. How many millileters of 10% alcohol solution must Katy use? And How much alcohol is in the 45% solution?
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let x=amount of 10% solution to mix
..
10%x+60%*140=45%(140+x)
.10x+84=63+.45x
.35x=21
x=60
45%(140+x)=45%*200=90
How much of 10% alcohol solution must Katy use? 60 millimeters
How much alcohol is in the 45% solution?90 millimeters