David had a total of 150 pink and yellow balloons. After giving away
13 of the pink balloons and 55 yellow balloons, there was an equal number of pink and yellow balloons left. How many pink balloons did he have at first?
| |
Pink balloons |
Yellow balloons |
Total |
| Before |
3 u |
2 u + 55 |
150 |
| Change |
- 1 u |
- 55 |
|
| After |
2 u |
2 u |
|
Total number of balloons at first
= 3 u + 2 u + 55
= 5 u + 55
5 u + 55 = 150
5 u = 150 - 55
5 u = 95
1 u = 95 ÷ 5 = 19
Number of pink balloons that David had at first
= 3 u
= 3 x 19
= 57
Answer(s): 57
