Question

Shades R Us charges $20 per day to rent a lounge chair and $15 per day to rent an umbrella. Dan and Lisa paid a total of $245 to rent a lounge chair and an umbrella each during their vacation. Lisa rented the chair and
umbrella for 1 day less than Dan. The following equation represents this situation, where x represents the
number of days Dan rented the lounge chair and umbrella.
20x + 15x + 20(x - 1) + 15(x - 1) = 245
What is the total amount Dan paid to rent the lounge chair and umbrella during his vacation