Will and Tom had 72 staplers together. Tom had 8 less staplers than Will. Both of them sold some of their staplers. Tom sold 10% more staplers than what Will sold. In the end, Tom had half as many staplers left as Will. How many staplers had Tom left?
| |
Will
(1) |
Tom
(2) |
Make p the same
(2)x2 = (3) |
Comparing Will
and Tom at first |
8 more |
|
|
| Before |
40 |
32 |
64 |
| Change |
- 10 u |
- 11 u |
- 22 u |
| After |
2 p |
1 p |
2 p |
Number of staplers that Tom had at first
= (72 - 8) ÷ 2
= 64 ÷ 2
= 32
Number of staplers that Will had at first
= 32 + 8
= 40
Number of staplers that Tom sold in percent
= 100% + 10%
= 110%
110% =
110100 =
1110 Make p the same.
(1) = (3)
40 - 10 u = 64 - 22 u
22 u - 10 u = 64 - 40
12 u = 24
1 u = 24 ÷ 12 = 2
Number of staplers that Tom had left
= 32 - 11 u
= 32 - 11 x 2
= 32 - 22
= 10
Answer(s): 10
