document.write( "Question 939940: A pharmacist needs to make a 1% hydrocortisone cream. How many grams of 2.5 % hydrocortisone cream should be added to 15 grams of cream base (0% hydrocortisone) to make a 1% cream? \n" ); document.write( "

Algebra.Com's Answer #572787 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = grams of 2.5% cream needed
\n" ); document.write( " $\"+.025x+\"$ = grams of hydrocortisone in 2.5% cream
\n" ); document.write( "------------------------
\n" ); document.write( " $\"+.025x+%2F+%28+x+%2B+15+%29+=+.01+\"$
\n" ); document.write( " $\"+.025x+=+.01%2A%28+x+%2B+15+%29+\"$
\n" ); document.write( " $\"+.025x+=+.01x+%2B+.15+\"$
\n" ); document.write( " $\"+.015x+=+.15+\"$
\n" ); document.write( " $\"+x+=+10+\"$
\n" ); document.write( "10 grams of 2.5% cream are needed
\n" ); document.write( "---------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+.025%2A10+%2F+%28+10+%2B+15+%29+=+.01+\"$
\n" ); document.write( " $\"+.25%2F25+=+.01+\"$
\n" ); document.write( " $\"+.25+=+.25+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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