Roshel, Sabrina and Gwen have 175 stamps. Roshel has
23 as many stamps as Sabrina. Gwen's stamps is
14 of the total number of Roshel's and Sabrina's stamps. How many stamps must Sabrina give to Gwen so that both Roshel and Gwen will have the same number of stamps?
Roshel |
Sabrina |
Gwen |
Total |
4x5 = 20 u |
1x5 = 5 u |
|
2x4 = 8 u |
3x4 = 12 u |
|
|
8 u |
12 u |
5 u |
175 |
Total number of stamps
= 8 u + 12 u + 5 u
= 25 u
25 u = 175
1 u = 175 ÷ 25 = 7
Roshel |
Sabrina |
Gwen |
Total |
8 u |
12 u |
5 u |
175 |
|
- 3 u |
+ 3 u |
|
8 u |
9 u |
8 u |
175 |
Number of stamps that Sabrina must give to Gwen
= 8 u - 5 u
= 3 u
= 3 x 7
= 21
Answer(s): 21