SOLUTION: In the lab, Brian has two solutions that contain alcohol and is mixing them with each other. He uses twice as much Solution A as Solution B. Solution A is 11% alcohol and Soluti

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Question 1120825: In the lab, Brian has two solutions that contain alcohol and is mixing them with each other. He uses twice as much Solution A as Solution B. Solution A is
11%
alcohol and Solution B is
20%
alcohol. How many milliliters of Solution B does he use, if the resulting mixture has
84
milliliters of pure alcohol?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = ml of solution B
+2x+ = ml of solution A
覧覧覧覧覧覧覧覧
+.11%2A2x+%2B+.2x+=+84+
+.22x+%2B+.2x+=+84+
+.42x+=+84+
+x+=+200+
He uses 200 ml of solution B