SOLUTION: How many liters of a 70 ​% acid solution must be mixed with a 20 ​% acid solution to get 350

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Question 1150645: How many liters of a 70
​%
acid solution must be mixed with a 20
​%
acid solution to get 350
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.

Posted in this format, I redirected it to the TRASH SECTION.



Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Description is incomplete.
350 Liters of what finished percent acid?


If result is 350 liters of some number p percent acid, then
x liters of 70%
350-x liters of 20%
70x%2B20%28350-x%29=p%2A350

7x%2B2%28350-x%29=35p
7x%2B2%2A350-2x=35p
5x%2B2%2A350=35p
5x=35p-2%2A350
x=7p-140
You finish from here. You need to know the given finished percent acid, p; and then you can evaluate x and 350-x.