At a shop, Samuel paid $14 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 = 14
2 u = 14 - 7
2 u = 7
1 u = 7 ÷ 2 = 3.50
Cost of 1 guide book
= 1 u + 7
= 3.50 + 7
= $10.50
(b)
Cost of 2 novels = $3.50
Cost of 1 novel
= 3.50 ÷ 2
= $1.75
Answer(s): (a) $10.50; (b) $1.75