Basic relations

Question

Problem Page
A textbook store sold a combined total of
444
physics and math textbooks in a week. The number of physics textbooks sold was two times the number of math textbooks sold. How many textbooks of each type were sold?

Answer 1

P = number of physics books sold

M = number of math books sold

 

P = 2M

 

P + M = 444

 

2M + M = 444

 

3M = 444

 

M = 444/3 = 148

 

P = 2M = 2(148) = 296

 

Test the answers.