document.write( "Question 1137666: A textbook store sold a combined total of 479 psychology and sociology textbooks in a week. The number of sociology textbooks sold was 47 less than the number of psychology textbooks sold. How many textbooks of each type were sold?
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Algebra.Com's Answer #755519 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = number of psychology books sold
\n" ); document.write( " $\"+x+-+47+\"$ = number of sociology books sold
\n" ); document.write( " $\"+x+%2B+%28+x+-+47+%29+=+479+\"$
\n" ); document.write( " $\"+2x+=+479+%2B+47+\"$
\n" ); document.write( " $\"+2x+=+526+\"$
\n" ); document.write( " $\"+x+=+263+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x+-+47+=+263+-+47+\"$
\n" ); document.write( " $\"+x+-+47+=+216+\"$
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\n" ); document.write( "263 psychology books were sold
\n" ); document.write( "216 sociology books were sold
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\n" ); document.write( "check:
\n" ); document.write( " $\"+263+%2B+216+=+479+\"$
\n" ); document.write( " $\"+479+=+479+\"$
\n" ); document.write( "OK \n" ); document.write( "

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