SOLUTION: SOLUTION: How many mL of 70% alcohol should be mixed with 20 mL of 20% alcohol to prepare 50% alcohol?

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Question 1001807: SOLUTION: How many mL of 70% alcohol should be mixed with 20 mL of 20% alcohol to prepare 50% alcohol?

Answer by Alan3354(69443) About Me  (Show Source):
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How many mL of 70% alcohol should be mixed with 20 mL of 20% alcohol to prepare 50% alcohol?
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Add x mls
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20*20 + x*70 = (20+x)*50