Linda had five times as many notebooks as staplers. After giving away 73 notebooks and selling 13 notebooks, she found out that she had four times as many notebooks as staplers left.
- How many notebooks did Linda have at first?
- How many notebooks and staplers did Linda have altogether at first?
|
Notebooks |
Staplers |
Total |
Before |
5 u |
1 u |
6 u |
Change 1 |
- 73 |
|
- 1 u |
Change 2 |
- 13 |
|
After |
4 u |
1 u |
5 u |
(a)
The number of staplers remains unchanged.
Number of notebooks that Linda gave away or sold
= 5 u - 4 u
= 1 u
1 u = 73 + 13 = 86
Number of notebooks that Linda had at first
= 5 u
= 5 x 86
= 430
(b)
Total number of notebooks and staplers that Linda had at first
= 1 u + 5 u
= 6 u
= 6 x 86
= 516
Answer(s): (a) 430; (b) 516