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document.write( "A druggist needs 20 oz of a 20% Phenobarital solution, but he only has a 5% solution and a 25% solution in stock. How many ounces of each available solution would he need to make the 20% solution he needs? \n" );
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Algebra.Com's Answer #442851 by checkley79(3341)![]() ![]() ![]() You can put this solution on YOUR website! .25X+.05(20-X)=.20*20 \n" ); document.write( ".25X+1-.05X=4 \n" ); document.write( ".20X=4-1 \n" ); document.write( ".20X=3 \n" ); document.write( "X=3/.20 \n" ); document.write( "X=15 OZ. OF THE 25% SOLUTION IS USED. \n" ); document.write( "20-15=5 OZ. OF THE 5% SOLUTION IS USED. \n" ); document.write( "PROOF: \n" ); document.write( ".25*15+.05*5=.20*20 \n" ); document.write( "3.75+.25=4 \n" ); document.write( "4=4 \n" ); document.write( " |