The population of New York City is about 18.8 million people. This is about 9.9 million more people than the population of Chicago. Write and solve an equation to find the approximate population of Chicago.
9.9 million
8.9 million
9.1 million
28.7 million
Let x be the population of Chicago.
18.8 million = x + 9.9 million
Subtract 9.9 million from both sides:
18.8 million - 9.9 million = x
8.9 million = x
Therefore, the approximate population of Chicago is 8.9 million.