Gabby, Tina and Victoria have 144 marbles. Gabby has
35 as many marbles as Tina. Victoria's marbles is
15 of the total number of Gabby's and Tina's marbles. How many marbles must Tina give to Victoria so that both Gabby and Victoria will have the same number of marbles?
| Gabby |
Tina |
Victoria |
Total |
5x8 =
40 u |
1x8 =
8 u |
|
3x5 =
15 u |
5x5 =
25 u |
|
|
| 15 u |
25 u |
8 u |
144 |
Total number of marbles
= 15 u + 25 u + 8 u
= 48 u
48 u = 144
1 u = 144 ÷ 48 = 3
| Gabby |
Tina |
Victoria |
Total |
| 15 u |
25 u |
8 u |
144 |
| |
- 7 u |
+ 7 u |
|
| 15 u |
18 u |
15 u |
144 |
Number of marbles that Tina must give to Victoria
= 15 u - 8 u
= 7 u
= 7 x 3
= 21
Answer(s): 21
