document.write( "Question 847856: In an experiment, a 100 ml of alcoholic solution must have a 20% alcohol in it. If 40ml of water is added in the solution, how much alcohol must be added, to maintain the 20% alcohol solution? \n" ); document.write( "
Algebra.Com's Answer #510712 by josgarithmetic(39618)\"\" \"About 
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The concentration of alcohol in the 100 ml. alcohol solution is still unknown. You do not then have a way to find how much water to add to make 20% alcohol. \r
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\n" ); document.write( "\n" ); document.write( "Assuming percents are vol/vol, and you have 100 ml. of some c percent alcohol, and you want to add 40 ml. of water; AND also some v amount of 100% alcohol to make 20% solution, ...\r
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\n" ); document.write( "\n" ); document.write( "Amount of pure alcohol = \"100%2Ac%2B100%2Av\"
\n" ); document.write( "Amount of solution result = \"100%2B40%2Bv\"
\n" ); document.write( "Equation for adjustments to be 20% alcohol: \"%28100c%2B100v%29%2F%28100%2B40%2Bv%29=20\";\r
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\n" ); document.write( "\n" ); document.write( "Simplified: \"%28100%28c%2Bv%29%29%2F%28140%2Bv%29=20\"
\n" ); document.write( "further simplifiable based on the convenient numbers,
\n" ); document.write( "\"%2810%28c%2Bv%29%29%2F%28140%2Bv%29=2\"
\n" ); document.write( "OR
\n" ); document.write( "\"highlight%285%28c%2Bv%29%2F%28140%2Bv%29=1%29\"----simplified equation to solve for v or c.\r
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