At a bookstore, Nathan paid $16 for 1 novel and 2 colouring books. The novel cost $3 more than the total cost of all the colouring books.
- How much did 1 novel cost?
- How much did 1 colouring book cost?
(a)
Cost of 2 colouring books = 1 u
Cost of 1 novel = 1 u + 3
Total cost of 2 colouring books and 1 novel
= 1 u + 1 u + 3
= 2 u + 3
2 u + 3 = 16
2 u = 16 - 3
2 u = 13
1 u = 13 ÷ 2 = 6.50
Cost of 1 novel
= 1 u + 3
= 6.50 + 3
= $9.50
(b)
Cost of 2 colouring books = $6.50
Cost of 1 colouring book
= 6.50 ÷ 2
= $3.25
Answer(s): (a) $9.50; (b) $3.25