Risa had four times as many notebooks as markers. After giving away 44 notebooks and selling 25 notebooks, she found out that she had thrice as many notebooks as markers left.
- How many notebooks did Risa have at first?
- How many notebooks and markers did Risa have altogether at first?
|
Notebooks |
Markers |
Total |
Before |
4 u |
1 u |
5 u |
Change 1 |
- 44 |
|
- 1 u |
Change 2 |
- 25 |
|
After |
3 u |
1 u |
4 u |
(a)
The number of markers remains unchanged.
Number of notebooks that Risa gave away or sold
= 4 u - 3 u
= 1 u
1 u = 44 + 25 = 69
Number of notebooks that Risa had at first
= 4 u
= 4 x 69
= 276
(b)
Total number of notebooks and markers that Risa had at first
= 1 u + 4 u
= 5 u
= 5 x 69
= 345
Answer(s): (a) 276; (b) 345