A Web music store offers two versions of a popular song. The size of the standard version is 2.2
megabytes (MB). The size of the high-quality version is 4.6
MB. Yesterday, there were 1190
downloads of the song, for a total download size of 3386
MB. How many downloads of the standard version were there?
standard version is s high quality version is h 2.2s - how many MB takes standard version 4.6h - how many MB takes high quality version we got system of equations s+h=1190 2.2s +4.6h =3386
h=1190-s substitute it into second equation 2.2s +4.6(1190-s) =3386 2.2s+4.6*1190 - 4.6s =3386 - 2.4s= 3386-4.6*1190 - 2.4s= 3386-5474 - 2.4s= -2088 s = 870
