SOLUTION: The world's most populous countries are China and India. As of mid-2005, the combined population of these two countries was estimated at 2.4 billion. If there was about 4/5 as many

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The world's most populous countries are China and India. As of mid-2005, the combined population of these two countries was estimated at 2.4 billion. If there was about 4/5 as many      Log On


   

Question 121516: The world's most populous countries are China and India. As of mid-2005, the combined population of these two countries was estimated at 2.4 billion. If there was about 4/5 as many people living in India as China, what was the population of each country, to the nearest tenth of a billion?
Answer by stanbon(75887) About Me  (Show Source):
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The world's most populous countries are China and India. As of mid-2005, the combined population of these two countries was estimated at 2.4 billion. If there was about 4/5 as many people living in India as China, what was the population of each country, to the nearest tenth of a billion?
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I + C = 2.4 billion
I= (4/5)C
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Substitute and solve for C
(4/5)C + C = 2.4 billion
1.8C = 2.4
C = 1 1/3 is appox 1.3 billion
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I = (4/5)(4/3) = 16/15 = 1.0667 is approx 1.1 billion
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Cheers,
Stan H.