Eghh i'm so bad at algebra > .< ? the length of a rectangle is 9.7 cm more than 4 times the width. if the perimeter of the rectangle is 91.4 cm, what are its dimensions?

or with this one? a rental car agency charges a flat fee of $110.00 plus $46.00 per day to rent a certain car. another agency charges a fee of $70.00 plus $54.00 per day to rent the same car.
using a graphing calculator, find the number of days for which the costs are the same. round your answer to the nearest whole day.