Question

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 **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 + 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 | |

million |

Step 1

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

Step 2

4 equations in 4...

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