document.write( "Question 839008: FIND ALL POSSIBLE SOLUTIONS \r
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document.write( "Shopping for gifts Last Christmas, Miriam Bought 4 More DVDs Than GAMES and 3 times as many CDs and GAMES combined. Altogether she bought 15 of the Three Items. How many of each did she buy?\r
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Algebra.Com's Answer #805943 by CubeyThePenguin(3113)![]() ![]() You can put this solution on YOUR website! d = number of DVDs \n" ); document.write( "g = number of games \n" ); document.write( "c = number of CDs\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "d = g + 4 = 3(c + g) \n" ); document.write( "d + c + g = 15\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Substitute d into the second equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(g + 4) + c + g = 15 \n" ); document.write( "c + 2g = 11\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3(c + g) + c + g = 15 \n" ); document.write( "4c + 4g = 15\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Use any method (substitution, elimination) to solve for c or g. We will use substitution: c = 11 - 2g.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4(11 - 2g) + 4g = 15 \n" ); document.write( "44 - 8g + 4g = 15 \n" ); document.write( "-4g = -29\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The solution is not an integer. \n" ); document.write( " |