A Web music store offers two versions of a popular song. The size of the standard version is 2.5 megabytes (MB). The size of the high-quality version is 4.7 MB. Yesterday, there were 970 downloads of the song, for a total download size of 3899 MB. How many downloads of the high-quality version were there?

Question

A Web music store offers two versions of a popular song. The size of the standard version is 2.5  megabytes (MB). The size of the high-quality version is 4.7 MB. Yesterday, there were   970 downloads of the song, for a total download size of  3899 MB. How many downloads of the high-quality version were there?

anonymous · Answer

s+h=970
2.5s+4.7h=3899

solve the system of equations