contestada

a textbook store sold a combined total of 392 chemistry and history textbook in a week. the number of chemistry textbook sold was 60 more than the number of history textbook sold. how many textbooks of each type were sold?

Respuesta :

Answer:

There were 226 chemistry books and 166 history books.

Explanation:

Let there are x chemistry books and y history books.

ATQ,

x + y = 392 ....(1)

The number of chemistry textbook sold was 60 more than the number of history textbook sold.

x = 60+y

or

x - y = 60 ....(2)

Adding equation (1) and (2).

2x = 392 + 60

2x = 452

x = 226

Put the value of x in equation (1).

226 + y = 392

y = 392-226

y = 166

Hence, there were 226 chemistry books and 166 history books.

Otras preguntas