Need help with my math problem.

Question

A textbook store sold a combined total of 477 math and chemistry textbooks in a week. The number of math textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?

Answer 1

c represents the number of chemistry books

2c represents the number of math books

 

c + 2c = 477 

 

Can you solve for c and answer?