Solution:
Given that,
Base fee = $ 18.95
Additional charge of $.79 for each mile driven
Let "x" be the miles driven
Henry had to pay $183.27 when he returned the truck
Therefore,
Cost for rent = base fee + charge for "x" miles
183.27 = 18.95 + 0.79x
0.79x = 183.27 - 18.95
0.79x = 164.32
Divide both sides by 0.79
x = 208
Thus Henry drove for 208 miles the truck