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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?
3540mb = 2.1mb(x) + 4.8mb(y)
X + y = 1210
Answer by Alan3354(69443)   (Show Source):
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?
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x = # of 2.1MB
y = # of 4.8MB
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3540 = 2.1x + 4.8y
X + y = 1210 --> y = 1210 - x
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Sub for y in the 1st eqn
3540 = 2.1x + 4.8*(1210 - x)
35400 = 21x + 58080 - 48x
-27x = -22680
x = 840
y = 370
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