SOLUTION: how many ounces of a 40% alcohol solution should be mixed with 60 ounces of a 70% alcohol solutionto produce a 60% alcohol solution?

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Question 242373: how many ounces of a 40% alcohol solution should be mixed with 60 ounces of a 70% alcohol solutionto produce a 60% alcohol solution?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Call the number of ounces X.
%28X%29%2840%29%2B60%2870%29=%28X%2B60%29%2860%29
40X%2B4200=60X%2B3600
20X=600
X=30
30 ounces