Bobby and Julian had 114 staplers together. Bobby had 18 more staplers than Julian. Both of them sold some of their staplers. Julian sold 20% less staplers than what Bobby sold. In the end, Julian had half as many staplers left as Bobby. How many staplers had Bobby left?
| |
Bobby
(1) |
Julian
(2) |
Make p the same
(2)x2 = (3) |
Comparing Bobby
and Julian at first |
18 more |
|
|
| Before |
66 |
48 |
96 |
| Change |
- 5 u |
- 4 u |
- 8 u |
| After |
2 p |
1 p |
2 p |
Number of staplers that Julian had at first
= (114 - 18) ÷ 2
= 96 ÷ 2
= 48
Number of staplers that Bobby had at first
= 48 + 18
= 66
Number of staplers that Julian sold in percent
= 100% - 20%
= 80%
80% =
80100 =
45 Make p the same.
(1) = (3)
66 - 5 u = 96 - 8 u
8 u - 5 u = 96 - 66
3 u = 30
1 u = 30 ÷ 3 = 10
Number of staplers that Bobby had left
= 66 - 5 u
= 66 - 5 x 10
= 66 - 50
= 16
Answer(s): 16
