A Web music store offers two versions of a popular song. The size of the standard version is
2.7 megabytes (MB). The size of the high-quality version is 4.7 MB. Yesterday, there were 700
downloads of the song, for a total download size
of 2850 MB. How many downloads of the standard version were there?

Question

A Web music store offers two versions of a popular song. The size of the standard version is 
2.7 megabytes (MB). The size of the high-quality version is 4.7 MB. Yesterday, there were 700
downloads of the song, for a total download size
of 2850 MB. How many downloads of the standard version were there?

kobeni-chan · Answer

You should start off this problem by making an equation of the given information (I think). 
2.7s + 4.7h = 2850.
s = standard
h = high-quality