Answer:
1104 miles
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