SOLUTION: How do I set this up and can you show me how to do it with the answer? A chemist needs 140 milliliters of a 35% solution but has only 23% and 65% solutions available. Find how

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Question 360158: How do I set this up and can you show me how to do it with the answer?
A chemist needs 140 milliliters of a 35% solution but has only 23% and 65% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Let represent the amount of 23% solution. Then represents the amount of 65% solution.

ml

represents the amount of pure whatever it is that is contained in the 23% solution.

ml

represents the amount of pure whatever in the 65% solution.

ml

represents the amount of pure whatever in the resulting 140 ml of 35% solution, so:



Solve for . Then compute .

John

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