SOLUTION: HOW MANY OUNCES OF EACH 15% AND 25% HYDROCHLORIC ACID SOLUTIONS MUST BE COMBINED TO PRODUCE A 20 OZ OF THE SOLUTION THAT IS 20%HYDROCHLORIC ACID?

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Question 476538: HOW MANY OUNCES OF EACH 15% AND 25% HYDROCHLORIC ACID SOLUTIONS MUST BE COMBINED TO PRODUCE A 20 OZ OF THE SOLUTION THAT IS 20%HYDROCHLORIC ACID?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
HOW MANY OUNCES OF EACH 15% AND 25% HYDROCHLORIC ACID SOLUTIONS MUST BE COMBINED TO PRODUCE A 20 OZ OF THE SOLUTION THAT IS 20%HYDROCHLORIC ACID?
:
Let x = amt of 25% acid required
the total is to be 20 oz, therefore:
(20-x) = amt of 15% acid required
:
.25x + .15(20-x) = .20(20)
.25x + 3 - .15x = 4
:
you should be able to solve this now