2. Wilton drives a taxicab. He charges $40 per hour. One passenger gave Wilton a tip of $30. He gave Wilton a total of $150. He is wondering how many total hours he drove the passenger.

(a) Define the unknown in the scenario and assign it a letter or symbol.

(b) Write an equation to represent the amount of money Wilton earned on the trip.

Thank you if you help!