document.write( "Question 347647: a pharmacist wishes to prepare 200ml of 8% solution, but has only a 10% solution and a 2% solution to mix together. how much of each solution should she use ? \n" ); document.write( "

Algebra.Com's Answer #248504 by Fombitz(32388) $\"\"$ $\"About$

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Let A be the amount of 10% solution.
\n" ); document.write( "Let B be the amount of 2%solution.
\n" ); document.write( ".
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\n" ); document.write( "Volume equation:
\n" ); document.write( "1. $\"A%2BB=200\"$
\n" ); document.write( "Concentration equation:
\n" ); document.write( " $\"10A%2B2B=8%28200%29=1600\"$
\n" ); document.write( "2. $\"5A%2BB=800\"$
\n" ); document.write( "Subtract eq. 1 from eq. 2,
\n" ); document.write( " $\"5A%2BB-A-B=800-200\"$
\n" ); document.write( " $\"4A=600\"$
\n" ); document.write( " $\"highlight%28A=150%29\"$ ml
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"150%2BB=200\"$
\n" ); document.write( " $\"highlight%28B=50%29\"$ ml \n" ); document.write( "

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