Answer:
hope you know Distance formula
Step-by-step explanation:
Think the answer is

units
Pretty sure the answer is 77
To find the unit rate, divide total miles by number of gallons:
418 miles / 16 gallons = 26.125 miles per gallon
Round the answer as needed.
The first step would be to add 7 to both sides.
3n-7=30
add 7
3n=37
divide by 3
n=12.33
Close enough, it would be 36+6x.