document.write( "Question 712971: if a pharmacist has 20L of a 10% drug solution. How many liters of 5$ solution must be added to get a mixture that is 8%? I need help setting up the problem. I can get the answer im just not sure how to set this up correctly. \n" ); document.write( "
Algebra.Com's Answer #438232 by stanbon(75887)\"\" \"About 
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if a pharmacist has 20L of a 10% drug solution. How many liters of 5$ solution must be added to get a mixture that is 8%?
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\n" ); document.write( "Equation:
\n" ); document.write( "drug + drug = drug
\n" ); document.write( "0.10*20 + 0.05x = 0.08(20+x)
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\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "10*20 + 5x = 8*20 + 8x
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\n" ); document.write( "3x = 2*20
\n" ); document.write( "x = 40/3
\n" ); document.write( "---
\n" ); document.write( "x = 13 1/3 L (amt. of 5% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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