Yen had the same number of black, white and green stamps at first. After giving some black and white stamps and 67 green stamps away, Yen had 214 stamps left. There were 4 times as many black stamps as white stamps left. The number of green stamps left was 11 fewer than the number of black stamps left. How many green stamps did she have at first?
| |
White |
Black |
Green |
Total |
| Before |
4 u + 56 |
4 u + 56 |
4 u + 56 |
|
| Change |
- 3 u - 56 |
- 56 |
- 67 |
|
| After |
1 u |
4 u |
4 u - 11 |
214 |
Yen had the same number of black, white and green stamps at first.
Total number of stamps in the end
= 1 u + 4 u + 4 u - 11
= 9 u - 11
9 u - 11 = 214
9 u = 214 + 11
9 u = 225
1 u = 225 ÷ 9 = 25
Number of green stamps that Yen had at first
= 4 u - 11 + 67
= 4 u + 56
= 4 x 25 + 56
= 156
Answer(s): 156
