Seth had a total of 121 brown and blue balloons. After giving away
12 of the brown balloons and 67 blue balloons, there was an equal number of brown and blue balloons left. How many brown balloons did he have at first?
| |
Brown balloons |
Blue balloons |
Total |
| Before |
2 u |
1 u + 67 |
121 |
| Change |
- 1 u |
- 67 |
|
| After |
1 u |
1 u |
|
Total number of balloons at first
= 2 u + 1 u + 67
= 3 u + 67
3 u + 67 = 121
3 u = 121 - 67
3 u = 54
1 u = 54 ÷ 3 = 18
Number of brown balloons that Seth had at first
= 2 u
= 2 x 18
= 36
Answer(s): 36
