Solving Best Rentals Car Rental Rates: Equation from Riddle

[MrNeWBiE]

Homework Statement

Best Rentals charges a daily fee plus a mileage fee for renting its cars. Jack was charged 40 $ for 500 kilometers, while Kelly was charged 70 $ for 1000 kilometers. What does Best Rental charge per day and per kilometer?

The Attempt at a Solution

I want to confirm my steps if it's right ,,,,

x+500y=40 and x+1000y=70

by using the system of the equations i will get the answer

am I right ?

 

[phyzguy]

Looks OK to me.