Hi,

In 2010 the population of Detroit, MI was 983,000 and was decreasing by about 5,000 people a year. 

In the same year, Phoenix, AR had a population of 497,000 and was increasing by about 20,000 people a year.

If these trends continue after how many years 'x' will each city have the same population?

983000 -5000x = 497000 +20000x

     486,000 = 25,000x 

        19.44years = x 

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