Xylia has a bag containing some green and blue stamps. If she removes 14 green stamps, 10% of the stamps in the bag are blue. If she adds another 72 blue stamps, 50% of the stamps in the bag are blue. How many green stamps are in the bag?
| |
Green stamps |
Blue stamps |
| Before |
9 u + 14 |
1 u |
| Change 1 |
- 14 |
|
| After 1 |
9x1 =
9 u |
1x1 =
1 u |
| Change 2 |
|
+ 72 |
| After 2 |
1x9 =
9 u |
1x9 =
9 u |
10% =
10100 =
11050% =
50100 =
12The number of green stamps remains unchanged at the second change when she adds another 72 blue stamps. Make the number of green stamps the same at the second change. LCM of 9 and 1 is 9.
Number of blue stamps added
= 9 u - 1 u
= 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Number of green stamps at first
= 9 u + 14
= 9 x 9 + 14
= 81 + 14
= 95
Answer(s): 95
