document.write( "Question 1146179: DVDs cost $12 and CDs cost $10. Chris bought 9 items and spent $104. Write a
\n" ); document.write( "system of linear equations that can be used to find how many DVDs (d) and how
\n" ); document.write( "many CDs (c) Chris bought. How many DVDs did Chris buy?
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Algebra.Com's Answer #767465 by richwmiller(17219)\"\" \"About 
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d+c=9
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\n" ); document.write( "12d+12c=108
\n" ); document.write( "12d+10c=104
\n" ); document.write( "2c=4
\n" ); document.write( "c=2 CD's
\n" ); document.write( "d=7 DVD's
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\n" ); document.write( "12*7+10*2=104
\n" ); document.write( "84+20=104
\n" ); document.write( "104=104
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