PSLEAt first, Leah had a total of 50 red and silver balloons. 19 silver balloons burst. She then increased the number of red balloons by 75%. After that, Leah had a total of 37 balloons. How many silver balloons did she have at first?
|
Red |
Silver |
Total |
Before |
4 u |
|
50 |
Change |
+ 3 u |
- 19 |
- 13 |
After |
7 u |
|
37 |
75100 =
34Decrease in the number of balloons
= 50 - 37
= 13
3 u = 19 - 13
3 u = 6
1 u = 6 ÷ 3 = 2
Number of red balloons at first
= 4 u
= 4 x 2
= 8
Number of silver balloons at first
= 50 - 8
= 42
Answer(s): 42