SOLUTION: A chemist needs to prepare 36 ounces of a 15% hydroelectric acid solution. Find the amount of 18​% solution and the amount of 9​% solution he should mix to get this sol

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Question 1098794: A chemist needs to prepare 36 ounces of a 15% hydroelectric acid solution. Find the amount of 18​% solution and the amount of 9​% solution he should mix to get this solution.
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
"Ounces", one would assume percents are as weight per weight.


Available are 18% and 9% acid solutions.
Let x be how much 18% acid.
36-x is how much 9% acid to use.

%2818x%2B9%2836-x%29%29%2F36=15

18x%2B9%2836-x%29=15%2A36
18x%2B9%2A36-9x=15%2A36
9x=15%2A36-9%2A36
9x=6%2A36
x=6%2A4
highlight%28x=24%29--------"ounces" of the 18% acid.
-
highlight%2812%29---------ounces of the 9% acid.



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"Hydroelectric Acid" ------ must be for fiction