PSLE Rachel had an equal number of green and grey beads. She gave 39 green beads and 17 grey beads to Mary. She gave the remaining beads to Nora. Nora was given 4 green beads for every 6 grey beads. How many beads did Rachel have at first?
|
Green |
Grey |
Before |
4 u + 39 |
6 u + 17 |
Change |
- 39 |
- 17 |
After |
4 u |
6 u |
The number of green and grey beads is equal at first.
4 u + 39 = 6 u + 17
6 u - 4 u = 39 - 17
2 u = 22
1 u = 22 ÷ 2 = 11
Number of green beads that Rachel had at first
= 4 u + 39
= 4 x 11 + 39
= 44 + 39
= 83
Number of beads that Rachel had at first
= 2 x 83
= 166
Answer(s): 166