document.write( "Question 164484: A Chemist has a solution that is 20 % acid and 80 % water. He adds 5 liters of water to make a solution that is 15 % acid. What is the volume of the original solution.\r
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\n" ); document.write( "\n" ); document.write( "answer:The original
\n" ); document.write( "solution had 15 liters of water \r
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\n" ); document.write( "\n" ); document.write( "need a break down of how my text book got: the original solution had 15 liters of water \n" ); document.write( "
Algebra.Com's Answer #121225 by themathprof(21)\"\" \"About 
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A Chemist has a solution that is 20 % acid and 80 % water. He adds 5 liters of water to make a solution that is 15 % acid. What is the volume of the original solution.
\n" ); document.write( "Let x=volume of original. From info in problem we have this table:
\n" ); document.write( "percent acid * amount = amt acid
\n" ); document.write( "water .00 .80x .00
\n" ); document.write( "acid 1.00 .20x .20x
\n" ); document.write( "solution x .20x
\n" ); document.write( "Now add 5 liters of water. New table looks like this:
\n" ); document.write( "water .00 .80x+5 .00
\n" ); document.write( "acid 1.00 .20x .20x
\n" ); document.write( "solution .15 x+5 .15(x+5)
\n" ); document.write( "From Column three:
\n" ); document.write( ".00+.20x=.15(x+5)
\n" ); document.write( "20x=15(x+5)
\n" ); document.write( "20x=15x+75
\n" ); document.write( "5x=75\r
\n" ); document.write( "\n" ); document.write( "Professor Martin Weissman
\n" ); document.write( "More Word problems worked out
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\n" ); document.write( "www.math911.com
\n" ); document.write( "x=15
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