PSLE Natalie had an equal number of pink and red beads. She gave 37 pink beads and 10 red beads to Mary. She gave the remaining beads to Nora. Nora was given 4 pink beads for every 7 red beads. How many beads did Natalie have at first?
|
Pink |
Red |
Before |
4 u + 37 |
7 u + 10 |
Change |
- 37 |
- 10 |
After |
4 u |
7 u |
The number of pink and red beads is equal at first.
4 u + 37 = 7 u + 10
7 u - 4 u = 37 - 10
3 u = 27
1 u = 27 ÷ 3 = 9
Number of pink beads that Natalie had at first
= 4 u + 37
= 4 x 9 + 37
= 36 + 37
= 73
Number of beads that Natalie had at first
= 2 x 73
= 146
Answer(s): 146