PSLE Raeann had an equal number of blue and brown beads. She gave 27 blue beads and 15 brown beads to Mary. She gave the remaining beads to Nora. Nora was given 2 blue beads for every 5 brown beads. How many beads did Raeann have at first?
|
Blue |
Brown |
Before |
2 u + 27 |
5 u + 15 |
Change |
- 27 |
- 15 |
After |
2 u |
5 u |
The number of blue and brown beads is equal at first.
2 u + 27 = 5 u + 15
5 u - 2 u = 27 - 15
3 u = 12
1 u = 12 ÷ 3 = 4
Number of blue beads that Raeann had at first
= 2 u + 27
= 2 x 4 + 27
= 8 + 27
= 35
Number of beads that Raeann had at first
= 2 x 35
= 70
Answer(s): 70