document.write( "Question 270276: A lab contains 24 ounces of iodine solution of strength 15%. How much pure iodine would you mix with it to get an iodine solution of strenth 25%? \n" ); document.write( "

Algebra.Com's Answer #198033 by josmiceli(19441) $\"\"$ $\"About$

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In words:
\n" ); document.write( "(ounces of iodine in final solution)/(ounces of final solution) = 25%
\n" ); document.write( "Let $\"x\"$ = ounces of pure iodine I need to add
\n" ); document.write( "given:
\n" ); document.write( " $\".15%2A24+=+3.6\"$ ounces of iodine in 15% solution
\n" ); document.write( "-----------------------------------------------------
\n" ); document.write( " $\"%283.6+%2B+x%29%2F%2824+%2B+x%29+=+.25\"$
\n" ); document.write( " $\"3.6+%2B+x+=+.25%2A%2824+%2B+x%29\"$
\n" ); document.write( " $\"3.6+%2B+x+=+6+%2B+.25x\"$
\n" ); document.write( " $\".75x+=+6+-+3.6\"$
\n" ); document.write( " $\".75x+=+2.4\"$
\n" ); document.write( " $\"x+=+2.4%2F.75\"$
\n" ); document.write( " $\"x+=+3.2\"$
\n" ); document.write( "3.2 ounces of pure iodine must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"%283.6+%2B+x%29%2F%2824+%2B+x%29+=+.25\"$
\n" ); document.write( " $\"%283.6+%2B+3.2%29%2F%2824+%2B+3.2%29+=+.25\"$
\n" ); document.write( " $\"6.8%2F27.2+=+.25\"$
\n" ); document.write( " $\"6.8+=+.25%2A27.2\"$
\n" ); document.write( " $\"6.8+=+6.8\"$
\n" ); document.write( "OK \n" ); document.write( "

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