Answer: $35.
Step-by-step explanation: Let A = 2 movers and one truck for hour = $65
B = 3 movers and one truck for hour = $80
So, 1 mover = B - A
= $80 - $65
= $15
Hence, 2 movers cost = 2 × $15
= $30
SO, rent of the truck hourly = A - cost of 2 movers
= $65 - $30
= $35
Therefore cost of renting the truck for an hour = $35