document.write( "Question 182308: John and Paul work together at a music store. In one afternoon they sold a total of 41 CDs. If Paul sold 9 more CDs than John how many CDs did John sell? \n" ); document.write( "

Algebra.Com's Answer #136839 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"p\"$ = number Paul sold
\n" ); document.write( "Let $\"j\"$ = number John sold
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"p+%2B+j+=+41\"$
\n" ); document.write( "(2) $\"p+=+j+%2B+9\"$
\n" ); document.write( "----------------
\n" ); document.write( "Substitute (2) in (1)
\n" ); document.write( "(1) $\"p+%2B+j+=+41\"$
\n" ); document.write( " $\"j+%2B+9+%2B+j+=+41\"$
\n" ); document.write( " $\"2j+=+32\"$
\n" ); document.write( " $\"j+=+16\"$
\n" ); document.write( "John sold 16 CDs
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"p+=+j+%2B+9\"$
\n" ); document.write( " $\"p+=+16+%2B+9\"$
\n" ); document.write( " $\"p+=+25\"$
\n" ); document.write( "(1) $\"p+%2B+j+=+41\"$
\n" ); document.write( " $\"25+%2B+16+=+41\"$
\n" ); document.write( " $\"41+=+41\"$
\n" ); document.write( "OK \n" ); document.write( "

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