Problema Solution
A bookstore placed two orders with a publisher. The first order was for 12 history books and 4 geography books, for the total cost of $1060. The second order was for 6 history books and 4 geography books, and the total cost was $ 640. What is the price of one history book? What is the price of one geography book?
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A bookstore placed two orders with a publisher. The first order was for 12 history books and 4 geography books, for the total cost of $1060. The second order was for 6 history books and 4 geography books, and the total cost was $ 640. What is the price of one history book? What is the price of one geography book?
Solution:
the price of one history book: x
the price of one geography book: y
so
12x+4y=1060
6x+4y=640
so
x= 70
y= 55
so
the price of one history book: $70
the price of one geography book: $55