document.write( "Question 1055309: Hello, I have atempted to solve some algebraic problems in word problems. Can anyone help a assist me? A Web music store offers two versions of a popular song. The size of the standard version is 2.1 megabytes (MB). The size of the high-quality version is 4.8MB. Yesterday, there were 1210 downloads of the song, for a total download size of 3540MB. How many downloads of the high-quality version were there?\r
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document.write( "3540mb = 2.1mb(x) + 4.8mb(y)
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document.write( "X + y = 1210 \n" );
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Algebra.Com's Answer #670547 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! A Web music store offers two versions of a popular song. The size of the standard version is 2.1 megabytes (MB). The size of the high-quality version is 4.8MB. Yesterday, there were 1210 downloads of the song, for a total download size of 3540MB. How many downloads of the high-quality version were there? \n" ); document.write( "--------- \n" ); document.write( "x = # of 2.1MB \n" ); document.write( "y = # of 4.8MB \n" ); document.write( "--- \n" ); document.write( "3540 = 2.1x + 4.8y \n" ); document.write( "X + y = 1210 --> y = 1210 - x \n" ); document.write( "--- \n" ); document.write( "Sub for y in the 1st eqn \n" ); document.write( "3540 = 2.1x + 4.8*(1210 - x) \n" ); document.write( "35400 = 21x + 58080 - 48x \n" ); document.write( "-27x = -22680 \n" ); document.write( "x = 840 \n" ); document.write( "y = 370 \n" ); document.write( " |