The population of New York City is about 18.8 million people this is about 9.9 million more than the population of Chicago right and solve an equation to find the approximate population of Chicago

Let x be the population of Chicago.

The population of New York City is 18.8 million, and this is about 9.9 million more than the population of Chicago.

Therefore, we can write this as an equation:

18.8 = x + 9.9

Now, solve for x:

18.8 - 9.9 = x
8.9 = x

So, the approximate population of Chicago is 8.9 million.