Jean had thrice as many files as staplers. After giving away 77 files and selling 14 files, she found out that she had twice as many files as staplers left.
- How many files did Jean have at first?
- How many files and staplers did Jean have altogether at first?
|
Files |
Staplers |
Total |
Before |
3 u |
1 u |
4 u |
Change 1 |
- 77 |
|
- 1 u |
Change 2 |
- 14 |
|
After |
2 u |
1 u |
3 u |
(a)
The number of staplers remains unchanged.
Number of files that Jean gave away or sold
= 3 u - 2 u
= 1 u
1 u = 77 + 14 = 91
Number of files that Jean had at first
= 3 u
= 3 x 91
= 273
(b)
Total number of files and staplers that Jean had at first
= 1 u + 3 u
= 4 u
= 4 x 91
= 364
Answer(s): (a) 273; (b) 364