document.write( "Question 933481: How much 100% acid is need along with 20% acid to get 60liters of 40% acid? \n" ); document.write( "
Algebra.Com's Answer #569318 by Fombitz(32388)\"\" \"About 
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Let A be the amount of 100% and B be the amount of 20%.
\n" ); document.write( "1.\"A%2BB=60\"
\n" ); document.write( ".
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( "\"100A%2B20B=60%28A%2BB%29=60%2860%29=3600\"
\n" ); document.write( "2.\"5A%2BB=180\"
\n" ); document.write( "Subtract eq. 1 from eq. 2,
\n" ); document.write( "\"5A%2BB-A-B=180-60\"
\n" ); document.write( "\"4A=120\"
\n" ); document.write( "\"A=30\"
\n" ); document.write( "Then,
\n" ); document.write( "\"30%2BB=60\"
\n" ); document.write( "\"B=30\"\r
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