Cousin Hector drove 1,851 miles to the reunion. He lives in Mexico and drove 747 miles through that country to the United States border. How many miles did he drive in the United States?

1104 miles

Step-by-step explanation:

Given

Hector drove 1851 miles totally Hector drove 747 miles from mexico till US border

Let x be the miles he drove in the United States

⇒

The total distance traveled by him = distance traveled in mexico + distance traveled in US

1851=747+x

x=1104 miles

⇒distance traveled in US = 1104 miles