Question

20. There were sold 200 books and magazines. Ono book costs $15 and oach magazino costs

$5: they spent $1500 in total. How many books and how many magazines wero sold?

Answer 1

the answer is 75
how do i know?
1500 divided by 20

Answer 2

Books = 50

Magazines = 150

Explanation:

b + m = 200

b = 200 - m..................(1)

15b + 5m = 1500

Substituting,

15(200-m) + 5m = 1500

3000 - 15m + 5m = 1500

-10m = 1500 - 3000

m = 1500 / 10 = 150

b = 200 - 150 = 50