Aweb music store offers two versions of a popular song. the size of the standard version is 2.8 megabytes (mb). the size of the high-quality version is 4.6 mb. yesterday, the high-quality version was downloaded three times as often as the standard version. the total size downloaded for the two versions was 4482 mb. how many downloads of the standard version were there?

Let's call :
x=the number of downloaded standard version
y= the number of downloaded high-quality version
We have : -the high-quality version was downloaded three times as often as the
standard version => 3x=y
-standard version is 2.8 megabytes .the high-quality version is 4.6
MB.The total size downloaded for the two versions was 4482 MB
=> 2.8x+4.6y=4482
Solve for x,y
x=270 , y=810