Zoe had the same number of silver, green and red stickers at first. After giving some silver and green stickers and 75 red stickers away, Zoe had 237 stickers left. There were 4 times as many silver stickers as green stickers left. The number of red stickers left was 15 fewer than the number of silver stickers left. How many red stickers did she have at first?
| |
Green |
Silver |
Red |
Total |
| Before |
4 u + 60 |
4 u + 60 |
4 u + 60 |
|
| Change |
- 3 u - 60 |
- 60 |
- 75 |
|
| After |
1 u |
4 u |
4 u - 15 |
237 |
Zoe had the same number of silver, green and red stickers at first.
Total number of stickers in the end
= 1 u + 4 u + 4 u - 15
= 9 u - 15
9 u - 15 = 237
9 u = 237 + 15
9 u = 252
1 u = 252 ÷ 9 = 28
Number of red stickers that Zoe had at first
= 4 u - 15 + 75
= 4 u + 60
= 4 x 28 + 60
= 172
Answer(s): 172
