document.write( "Question 666008: Chris went shopping and bought her 9 nephews each a gift, either a video costing $14.95 or a CD costing $16.88. She spent $142.27 on gifts. How many videos and CD's did she buy? \n" ); document.write( "

Algebra.Com's Answer #414213 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = number of videos bought
\n" ); document.write( "Let $\"+b+\"$ = number of CDs bought
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"+1495a+%2B+1688b+=+14227+\"$ ( in cents )
\n" ); document.write( "(2) $\"+a+%2B+b+=+9+\"$
\n" ); document.write( "---------------
\n" ); document.write( "Multiply both sides of (2) by $\"+1495+\"$ and
\n" ); document.write( "subtract (2) from (1)
\n" ); document.write( "(1) $\"+1495a+%2B+1688b+=+14227+\"$
\n" ); document.write( "(2) $\"+-1495a+-+1495b+=+-13455+\"$
\n" ); document.write( " $\"+193b+=+772+\"$
\n" ); document.write( " $\"+b+=+4+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(2) $\"+a+%2B+4+=+9+\"$
\n" ); document.write( "(2) $\"+a+=+5+\"$
\n" ); document.write( "She bought 5 videos and 4 CDs\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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