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.
28.7 million
9.9 million
9.1 million
8.9 million
Let x represent the population of Chicago.
18.8 million (population of NYC) = 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 about 8.9 million people.
Answer: 8.9 million