A file cost $3.50. A pencil cost $14.50 more than the file. Gabby spent $75 on such files and pencils. She bought twice as many files as pencils.
- How many pencils did Gabby buy?
- How much money did Gabby spend on the files?
|
Files |
Pencils |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
18 |
|
Total value |
7 u |
18 u |
75 |
(a)
Cost of a pencil
= 14.50 + 3.50
= $18
Total cost of files and pencils
= 7 u + 18 u
= 25 u
25 u = 75
1 u = 75 ÷ 25 = 3
Number of pencils that Gabby bought
= 1 u
= 3
(b)
Amount that Gabby spent on files
= 7 u
= 7 x 3
= $21
Answer(s): (a) 3; (b) $21