PSLE Min had an equal number of brown and yellow beads. She gave 35 brown beads and 20 yellow beads to Mary. She gave the remaining beads to Nora. Nora was given 5 brown beads for every 8 yellow beads. How many beads did Min have at first?
|
Brown |
Yellow |
Before |
5 u + 35 |
8 u + 20 |
Change |
- 35 |
- 20 |
After |
5 u |
8 u |
The number of brown and yellow beads is equal at first.
5 u + 35 = 8 u + 20
8 u - 5 u = 35 - 20
3 u = 15
1 u = 15 ÷ 3 = 5
Number of brown beads that Min had at first
= 5 u + 35
= 5 x 5 + 35
= 25 + 35
= 60
Number of beads that Min had at first
= 2 x 60
= 120
Answer(s): 120