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