document.write( "Question 1146179: DVDs cost $12 and CDs cost $10. Chris bought 9 items and spent $104. Write a
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document.write( "system of linear equations that can be used to find how many DVDs (d) and how
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document.write( "many CDs (c) Chris bought. How many DVDs did Chris buy? \n" );
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Algebra.Com's Answer #767465 by richwmiller(17219) You can put this solution on YOUR website! d+c=9 \n" ); document.write( "12d+10c=104 \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 \n" ); document.write( "check \n" ); document.write( "12*7+10*2=104 \n" ); document.write( "84+20=104 \n" ); document.write( "104=104 \n" ); document.write( "ok\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |