Tevin goes to a fast food restaurant and orders some tacos and burritos. He sees on the nutrition menu that tacos are 240 calories and burritos are 500 calories. If he ordered 11 items and consumed a total of 4200 calories, how many tacos and how many burritos did Tevin order and eat?

PLEASE HELP!!!! IM GIVING 20 POINTS!!! THANKSSSS