Question

A textbook store sold a combined total of 343 history and chemistry textbooks in a week. The number of chemistry textbooks sold was 59 less than the number of history textbooks sold. How many textbooks of each type were sold?

Answer 1

Let the number of History books be x. Then:-

x + x - 59 = 343

2x = 402

x = 201

So there are 201 History books and (201 - 59) = 142 Chemistry books.