Risa had four times as many staplers as markers. After giving away 29 staplers and selling 40 staplers, she found out that she had thrice as many staplers as markers left.
- How many staplers did Risa have at first?
- How many staplers and markers did Risa have altogether at first?
|
Staplers |
Markers |
Total |
Before |
4 u |
1 u |
5 u |
Change 1 |
- 29 |
|
- 1 u |
Change 2 |
- 40 |
|
After |
3 u |
1 u |
4 u |
(a)
The number of markers remains unchanged.
Number of staplers that Risa gave away or sold
= 4 u - 3 u
= 1 u
1 u = 29 + 40 = 69
Number of staplers that Risa had at first
= 4 u
= 4 x 69
= 276
(b)
Total number of staplers and markers that Risa had at first
= 1 u + 4 u
= 5 u
= 5 x 69
= 345
Answer(s): (a) 276; (b) 345