As Clarice drove the same distance for 4 days we can write: 4x as the same number repeats each of these days. Therefore x is going to be the distance driven each of the first four days.
The fifth day she only drove 48 miles so we just write this number as we know it.
The total miles driven are 828 miles so that is going to be the final result.
Now we write it:
4x + 48= 828
4x=828 - 48
4x= 780
x= 780/4
x= 195 miles
To check if it is correct:
195 + 195 + 195 + 195 + 48 = 828 miles