document.write( "Question 1036893: A local Computer City sells batteries ($2) and small boxes of pens ($8). In August, total sales were $936. Customers bought 8 times as many batteries as boxes of pens. How many of each did Computer City sell? \n" ); document.write( "

Algebra.Com's Answer #651650 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+p+\"$ = number of boxes of pens sold
\n" ); document.write( "Let $\"+b+\"$ = number of batteries sold
\n" ); document.write( "--------------------------------
\n" ); document.write( "(1) $\"+8p+%2B+2b+=+936+\"$
\n" ); document.write( "(2) $\"+b+=+8p+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "Substitute (2) into (1)
\n" ); document.write( "(1) $\"+8p+%2B+2%2A%288p%29+=+936+\"$
\n" ); document.write( "(1) $\"+8p+%2B+16p+=+936+\"$
\n" ); document.write( "(1) $\"+24p+=+936+\"$
\n" ); document.write( "(1) $\"+p+=+39+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+b+=+8p+\"$
\n" ); document.write( "(2) $\"+b+=+8%2A39+\"$
\n" ); document.write( "(2) $\"+b+=+312+\"$
\n" ); document.write( "-----------------
\n" ); document.write( "39 boxes of pens were sold
\n" ); document.write( "312 batteries were sold
\n" ); document.write( "-------------------------
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+8p+%2B+2b+=+936+\"$
\n" ); document.write( "(1) $\"+8%2A39+%2B+2%2A312+=+936+\"$
\n" ); document.write( "(1) $\"+312+%2B+624+=+936+\"$
\n" ); document.write( "(1) $\"+936+=+936+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );