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document.write( "A pharmacist needs 70 liters of a 50% alcohol solution. She has available a 30% solution and a 80% solution. How many liters of each solution should she mix to obtain what she needs? \n" );
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Algebra.Com's Answer #444500 by checkley79(3341)![]() ![]() ![]() You can put this solution on YOUR website! .80X+.30(70-X)=.5*70 \n" ); document.write( ".80X+21-.30X=35 \n" ); document.write( ".50X=35-21 \n" ); document.write( ".50X=14 \n" ); document.write( "X=14/.5 \n" ); document.write( "X=28 L. OF 80% SOLUTION IS USED. \n" ); document.write( "70-28=42 L. OF 20% SOLUTION IS USED. \n" ); document.write( "PROOF: \n" ); document.write( ".80*28+.30*42=.5*70 \n" ); document.write( "22.4+12.6=35 \n" ); document.write( "35=35 \n" ); document.write( " \n" ); document.write( " |