SOLUTION: how many milliliters of pure water should a pharmasist add to 50 ml of a 15% minoxidil solution to make a 10% minoxidil solution.

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Question 808369: how many milliliters of pure water should a pharmasist add to 50 ml of a 15% minoxidil solution to make a 10% minoxidil solution.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = ml of pure water to be added
+.15%2A50+=+7.5+ ml of minoxydil in 15% solution
+7.5+%2F+%28+x+%2B+50+%29+=+.1+
+7.5+=+.1%2A%28+x+%2B+50+%29+
+7.5+=+.1x+%2B+5+
+.1x+=+2.5+
+x+=+25+
25 ml of pure water should be added