SOLUTION: Twice last month, Julie rented a car at Rent-it car rental in CA and traveled around the southwest on business. Rent-it rents this car for a daily fee plus an additional charge per

Question 1083825: Twice last month, Julie rented a car at Rent-it car rental in CA and traveled around the southwest on business. Rent-it rents this car for a daily fee plus an additional charge per mile driven. Julie recalls that her first trip lasted 4 days, she drove 450 miles, and the rental costed her $240.50. On her second trip, she drove the same car a distance of 200 miles in 3 days and paid $146.00 for the rental. Find the daily fee and mileage charge.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
4x+450y=240.50; x= days, y= miles driven
3x+200y=146.00
==============
12x+1350y=721.50
-12x-800y=584
-550y=-137.50
y=$0.25 per mile
substitute into first
4x+112.5=240.50
4x=128
x=$32 per day
-----------------
Check in second
96+50=146

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