Tim and Ryan had a total of 166 beads at first. After Tim bought 21 more beads and Ryan gave away 13 beads, Tim now has the same number of beads as Ryan. How many beads did Tim have at first?
| |
Tim |
Ryan |
Total |
| Before |
1 u - 21 |
1 u + 13 |
166 |
| Change |
+ 21 |
- 13 |
|
| After |
1 u |
1 u |
174 |
Total number of beads in the end
= 166 + 21 - 13
= 174
2 u = 174
1 u = 174 ÷ 2 = 87
Number of beads that Tim had in the end
= 1 u
= 87
Number of beads that Tim had at first
= 87 - 21
= 66
Answer(s): 66
