Question

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

Answer 1

not enough info

Explanation:

Let h = number of history books.

Let m = number of math books.

"The number of history textbooks sold was three times the number of math textbooks sold."

h = 3m

"A textbook store sold a combined total of history and math textbooks in a week."

h + m = t

t = total number of books sold.

We have a system of equations:

h = 3m

h + m = t

Since we do not have a value for t, and we have a system of 2 equations in 3 variables, we cannot find the numbers of history or math books sold.