PSLE Linda had an equal number of grey and blue beads. She gave 35 grey beads and 15 blue beads to Mary. She gave the remaining beads to Nora. Nora was given 2 grey beads for every 4 blue beads. How many beads did Linda have at first?
|
Grey |
Blue |
Before |
2 u + 35 |
4 u + 15 |
Change |
- 35 |
- 15 |
After |
2 u |
4 u |
The number of grey and blue beads is equal at first.
2 u + 35 = 4 u + 15
4 u - 2 u = 35 - 15
2 u = 20
1 u = 20 ÷ 2 = 10
Number of grey beads that Linda had at first
= 2 u + 35
= 2 x 10 + 35
= 20 + 35
= 55
Number of beads that Linda had at first
= 2 x 55
= 110
Answer(s): 110