document.write( "Question 1114809: Theresa Morgan, a chemist, has a 20% hydrochloric acid solution and a 50% hydrochloric acid solution. How many liters of each should she mix to get 431.25 liters of a hydrochloric acid solution with a 42% acid concentration? \n" ); document.write( "
Algebra.Com's Answer #729724 by josgarithmetic(39617)\"\" \"About 
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\"system%2820x%2B50y=42%2A431.25%2Cx%2By=431.25%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"system%282x%2B5y=1811.25%2Cx%2By=431.25%29\"\r
\n" ); document.write( "\n" ); document.write( "You might want to use Elimination Method at least for either variable.\r
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\n" ); document.write( "\n" ); document.write( "\"system%282x%2B5y=1811.25%2C2x%2B2y=862.5%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"3y=1811.25-862.5\"\r
\n" ); document.write( "\n" ); document.write( "\"3y=948.75\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28y=316.25%29\"------------of the 50% HCl\r
\n" ); document.write( "\n" ); document.write( ".
\n" ); document.write( "\"highlight%28x=115%29\"--------------of 20% HCl
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