help solve: a store sold a combined total of 396 physic and math books in a week. the number of physic books sold w. how many books of each were sold?

Question

help solve: a store sold a combined total of 396 physic and math books in a week. the number of physic books sold was three times the number of math books. how many books of each were sold?

Answer 1

Let m = the number of math books.

 

And we know there were 3 times as many physics books as that m up there. Call them 3m.

 

We know that "m" math books and "3m" physics books added together make 396 total books.

 

So m + 3m = 396, so

 

4m = 396, so

 

m = 396 divided by 4, which equals...

 

(you finish!)