Ella is a car salesperson and is paid a weekly salary and a commission for each car she sells. She is paid a weekly salary
of w dollars. She also earns n dollars for each new car she sells
and u dollars for every used car she sells.
• She earned $2,000 over a week when she sold 4 new cars
and 3 used cars.
• She earned the same amount over a week when she sold 6
new cars as over two weeks when she sold 5 used cars.

Which system of equations can be used to find w, n, and u?