Jacob wants to buy some files of the same price. If she buys 3 files, she will have $3.20 left. If she buys 6 files, she will short of $1.30.
- How much does each file cost?
- How much does Jacob have?
(a)
Difference in the number of files
= 6 - 3
= 3
Amount that Jacob needs to buy 3 files
= 3.20 + 1.30
= $4.50
Cost of each file
= 4.50 ÷ 3
= $1.50
(b)
Amount that Jacob has
= 3 x 1.50 + 3.20
= $7.70
Answer(s): (a) $1.50; (b) $7.70