Jason owns a food truck that sells tacos and burritos. He sells each taco for $4.75 and
each burrito for $7.50. Yesterday Jason made a total of $790 in revenue from all
burrito and taco sales and there were twice as many burritos sold as there were tacos
sold. Write a system of equations that could be used to determine the number of
tacos sold and the number of burritos sold. Define the variables that you use to write
the system.