At the end of a certain year, the four companies with the largest number of home Internet users in the United States were Microsoft, Time Warner, Yahoo, and Google, with a combined audience of 284 million users. Taking x to be the Microsoft audience in millions, y the Time Warner audience in millions, z the Yahoo audience in millions, and u the Google audience in millions, it was observed that     z − u = 3(x − y) + 12     x + y = 44 + z + uand  x − y + z − u = 36. How large was the audience of each of the four companies at the end of that year?Microsoft      millionTime Warner      millionYahoo      millionGoogle       million

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Asked Sep 21, 2019
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At the end of a certain year, the four companies with the largest number of home Internet users in the United States were MicrosoftTime WarnerYahoo, and Google, with a combined audience of 284 million users. Taking x to be the Microsoft audience in millions, y the Time Warner audience in millions, z the Yahoo audience in millions, and u the Google audience in millions, it was observed that

          z  −  u  =  3(x − y) + 12
          x  +  y  =  44 + z + u
and   x  −  y  +  z  −  u  =  36.

 

How large was the audience of each of the four companies at the end of that year?

Microsoft        million
Time Warner        million
Yahoo        million
Google         million
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Expert Answer

Step 1

To solve for the 4 unknowns (in millions) using 4 equations

Step 2

4 equations in 4...

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Re arrange the equations (I) x+yz +u = 284 Зх- Зу--+и%3-12 (2) (3) x+y--u= 44 (4) x-y -u= 36

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