PSLE Linda had an equal number of black and silver beads. She gave 36 black beads and 24 silver beads to Mary. She gave the remaining beads to Nora. Nora was given 2 black beads for every 4 silver beads. How many beads did Linda have at first?
|
Black |
Silver |
Before |
2 u + 36 |
4 u + 24 |
Change |
- 36 |
- 24 |
After |
2 u |
4 u |
The number of black and silver beads is equal at first.
2 u + 36 = 4 u + 24
4 u - 2 u = 36 - 24
2 u = 12
1 u = 12 ÷ 2 = 6
Number of black beads that Linda had at first
= 2 u + 36
= 2 x 6 + 36
= 12 + 36
= 48
Number of beads that Linda had at first
= 2 x 48
= 96
Answer(s): 96