Sally needs a new car. She is trying to lesson her "carbon foot print", but at the same time she wants to spend her money wisely. She is deciding between the Lexus RX 450h (hybrid) and the Lexus RX 350. The RX 450h costs $43,700 with anticipated gas costs of $1,454 per year. The RX 350 costs $38,650, with anticipated gas costs of $2,078 per year. How many years will it take for the total costs of the two SUVs the same? What will the total cost be?
How do I do this problem using both elimination and substitution?