SOLUTION: Two companies with top revenues In the fortune 500 list for 2012 were ExxonMobil and Walmart. Their revenues together totaled $919.1 billion. ExxonMobil revenues were $19.3 billion

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Question 987255: Two companies with top revenues In the fortune 500 list for 2012 were ExxonMobil and Walmart. Their revenues together totaled $919.1 billion. ExxonMobil revenues were $19.3 billion less than those of Walmart. What were the revenues of each corporation?
Answer by macston(5194) About Me  (Show Source):
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E=Exxon revenue; W=Walmart revenue=E+$19.3 billion
E+W=$919.1 billion
E+(E+$19.3 billion)=$919.1 billion
2E=$899.8 billion
E=$449.9 billion
ANSWER 1: ExxonMobil revenues were $449.9 billion.
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W=E+$19.3 billion
W=$449.9 billion+$19.3 billion
W=$469.2 billion
ANSWER 2: Walmart revenues were $469.2.
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CHECK:
E+W=$919.1 billion
$449.9 billion + $469.2 billion = $919.1 billion
$919.1 billion = $919.1 billion