Sean had a total of 141 grey and brown flags. After giving away
89 of the grey flags and 61 brown flags, there was an equal number of grey and brown flags left. How many grey flags did he have at first?
| |
Grey flags |
Brown flags |
Total |
| Before |
9 u |
1 u + 61 |
141 |
| Change |
- 8 u |
- 61 |
|
| After |
1 u |
1 u |
|
Total number of flags at first
= 9 u + 1 u + 61
= 10 u + 61
10 u + 61 = 141
10 u = 141 - 61
10 u = 80
1 u = 80 ÷ 10 = 8
Number of grey flags that Sean had at first
= 9 u
= 9 x 8
= 72
Answer(s): 72
