document.write( "Question 157946: A pharmacist needs 70 liters of a 50% alcohol solution. She has availible a 30 % solution and an 80% solution. How many liters of each solution should she mix to obtain 70 liters of a 50% alcohol solution ?\r
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document.write( "Also from a take home exam \n" );
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Algebra.Com's Answer #116403 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 70*.5=.30X+.80(70-X) \n" ); document.write( "35=.30X+56-.80X \n" ); document.write( "35-56=-.50X \n" ); document.write( "-21-.5X \n" ); document.write( "X=-21/-.5 \n" ); document.write( "X=42 LITERS OF THE 30% ALCOHOL IS NEEDED. \n" ); document.write( "70-42=28 LITERS OF THE 50% ALCOHOL IS ALSO NEEDED. \n" ); document.write( "PROOF: \n" ); document.write( "70*.5=.30*42+.80*28 \n" ); document.write( "35=12.6+22.4 \n" ); document.write( "35=35 \n" ); document.write( " \n" ); document.write( " |