document.write( "Question 890349: how many ml of 20% acid solution should be added to pure acid to obtain 40 ml of 45% acid solution?
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Algebra.Com's Answer #538946 by josgarithmetic(39617)\"\" \"About 
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You also want to be able to find how many ml. of the pure 100% acid. The quantities of both acids to be mixed are unknown.\r
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\n" ); document.write( "\n" ); document.write( "The problem is fully explained and solved in this lesson: Mixing two concentrations for known amount of mixture - http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev
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