Jack had
29 as many beads as Min. After Jack gave away 29 beads, he had 78 less beads than Min. How many beads did Min have?
| |
Jack |
Min |
| Before |
2 u |
9 u |
| Change |
- 29 |
|
| After |
2 u - 29 |
9 u |
Min had 78 more beads than Jack in the end. So, if Jack had another 78 beads, he would have the same number of beads as Min.
9 u = 2 u - 29 + 78
9 u - 2 u = 78 - 29
7 u = 49
1 u = 49 ÷ 7 = 7
Number of beads that Min had at first
= 9 u
= 9 x 7
= 63
Answer: 63
