At a book shop, Avery paid $12 for 1 guide book and 2 novels. The guide book cost $7 more than the total cost of all the novels.
- How much did 1 guide book cost?
- How much did 1 novel cost?
(a)
Cost of 2 novels = 1 u
Cost of 1 guide book = 1 u + 7
Total cost of 2 novels and 1 guide book
= 1 u + 1 u + 7
= 2 u + 7
2 u + 7 = 12
2 u = 12 - 7
2 u = 5
1 u = 5 ÷ 2 = 2.50
Cost of 1 guide book
= 1 u + 7
= 2.50 + 7
= $9.50
(b)
Cost of 2 novels = $2.50
Cost of 1 novel
= 2.50 ÷ 2
= $1.25
Answer(s): (a) $9.50; (b) $1.25