document.write( "Question 419057: Frank wants a cleaning solution that is 40% acid. He has a large supply of both 25% and 50% solution. How many liters of each does he need to mix to make 30liters of the desired solution? \n" ); document.write( "
Algebra.Com's Answer #293126 by mananth(16946)\"\" \"About 
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percent ---------------- quantity
\n" ); document.write( "25 ---------------- x
\n" ); document.write( "50 ---------------- 30-x
\n" ); document.write( "40.00% ---------------- 30\r
\n" ); document.write( "\n" ); document.write( "..............\r
\n" ); document.write( "\n" ); document.write( "25x+50(30-x)=40 *30
\n" ); document.write( "25x+1500-50x=1200
\n" ); document.write( "25x-50x =1200-1500
\n" ); document.write( "-25x=-300
\n" ); document.write( "/-25
\n" ); document.write( "x=12liters of 25.00%
\n" ); document.write( "18 liters of 50.00%
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