What does x equal in the picture below?

All of the outside angles added together are 360 so it would be 7x+49+6x+33+83=360

13x+165=360

13x=195

x=15

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.