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17 December, 03:58

The USA is the country with the most personal computers in use, followed by china. If the USA has 115.000 thousand more computers than china and the total number of couputers for both countries is 505,780 thousand, find the number of computers for each country.

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  1. 17 December, 04:56
    0
    Let the number in China be x.

    USA has 115 000 more than China = x + 115000

    Total = 505 780

    x + (x + 115000) = 505780

    x + x + 115000 = 505780

    2x + 115000 = 505780

    2x = 505780 - 115000

    2x = 390780

    x = 390780/2

    x = 195 390

    So China is x, 195 390, USA = x + 115000 = 195390 + 115000 = 310390

    China = 195 390

    USA = 310 390

    Hope this clarifies it.
  2. 17 December, 07:15
    0
    2x + 115,000 = 505280

    2x = 390,780

    x = 195,390

    America = x + 115,000 = 310,390

    China = x = 195,390

    Just to check, 310,390 + 195,390 = 505,780.
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