Luke wants to buy some notebooks of the same price. If she buys 3 notebooks, she will have $7.80 left. If she buys 5 notebooks, she will short of $1.20.
- How much does each notebook cost?
- How much does Luke have?
(a)
Difference in the number of notebooks
= 5 - 3
= 2
Amount that Luke needs to buy 2 notebooks
= 7.80 + 1.20
= $9.00
Cost of each notebook
= 9.00 ÷ 2
= $4.50
(b)
Amount that Luke has
= 3 x 4.50 + 7.80
= $21.30
Answer(s): (a) $4.50; (b) $21.30