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17 January, 06:25

In 2015 the populations of City X and City Y were

equal. From 2010 to 2015, the population of City X

increased by 20% and the population of City Y

decreased by 10%. If the population of City X was

120,000 in 2010, what was the population of City Y

in 2010?

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Answers (1)
  1. 17 January, 06:32
    0
    160,000

    Step-by-step explanation:

    120,000 + 0.2 (120,000) = 120,000+24,000=144,000

    144,000 were both populations in 2015.

    x-0.1x = 144,000

    0.9x=144,000

    x=160,000

    The Population of City Y in 2010 was 160,000
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