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)![]() ![]() ![]() You can put this solution on YOUR website! 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%? \n" ); document.write( "----- \n" ); document.write( "Equation: \n" ); document.write( "drug + drug = drug \n" ); document.write( "0.10*20 + 0.05x = 0.08(20+x) \n" ); document.write( "---- \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "10*20 + 5x = 8*20 + 8x \n" ); document.write( "--- \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) \n" ); document.write( "==================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "==================== \n" ); document.write( " |