The number of red and green stickers are equal.
If Adam gives away 90 red stickers and 20 green stickers,
the ratio of red stickers to green stickers becomes 3 : 8.
How many stickers are there at first?
|
Red |
Green |
Before |
3 u + 90 |
8 u + 20 |
Change |
- 90 |
- 20 |
After |
3 u |
8 u |
The number of red and green stickers is the same at first.
3 u + 90 = 8 u + 20
8 u - 3 u = 90 - 20
5 u = 70
1 u = 70 ÷ 5 = 14
Number of stickers that Adam has at first
= 3 u + 90 + 8 u + 20
= 3 u + 8 u + 90 + 20
= 11 u + 110
= 11 x 14 + 110
= 154 + 110
= 264
Answer(s): 264