It costs $15 to send 3 packages through a certain shipping company. Consider the number of packages per dollar
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Let x be number of downloads of standard version and y be number of downloads of high quality versions.
The hight quality downloads are twice as the standar downloads. So,
The downloaded data for x standard version is 2.7x and for y high quality version is 4.2y. The total downloaded data is 3219. So,
Substitute 2x for y in the equation and solve the obtained equation for x.
So value of x is 290. Thus downloads of the standard version were 290.
Answer: 290