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Posted by on Wednesday, May 26, 2010 at 10:22am.

Pewee adds two liters of pure alcohol to a 30% solution of alcohol in water. If the new concentration is 40%, how many liters of the original solution were there?

  • MATH - , Wednesday, May 26, 2010 at 10:54am

    .3 x + 2 = .4(2+x)

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