document.write( "Question 826416: A chemist has a concentrated washing solution. If she has 2 liters of the 50% solution how much water must be added to dilute it to a 20% solution? \n" ); document.write( "

Algebra.Com's Answer #498052 by josgarithmetic(39620) $\"\"$ $\"About$

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The water by itself does not add any washing solution. Zero percent washing solution.\r
\n" ); document.write( "\n" ); document.write( "See in my profile for the lesson Mixture: two concentrations, but in this example, $\"M=2%2Bw\"$ , in which w is how much water to add, and M, not really needed, is the final amount of total mixture.\r
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\n" ); document.write( "\n" ); document.write( " $\"2%2A50%2F%28w%2B2%29=20\"$ is all you need. Note that the expression $\"w%2A0=0\"$ , would not be necessary as part of the numerator. You could use it, but absolutely not necessary. \n" ); document.write( "

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