The number of red and green stickers are equal.
If Adam gives away 60 red stickers and 40 green stickers,
the ratio of red stickers to green stickers becomes 2 : 7.
How many stickers are there at first?
|
Red |
Green |
Before |
2 u + 60 |
7 u + 40 |
Change |
- 60 |
- 40 |
After |
2 u |
7 u |
The number of red and green stickers is the same at first.
2 u + 60 = 7 u + 40
7 u - 2 u = 60 - 40
5 u = 20
1 u = 20 ÷ 5 = 4
Number of stickers that Adam has at first
= 2 u + 60 + 7 u + 40
= 2 u + 7 u + 60 + 40
= 9 u + 100
= 9 x 4 + 100
= 36 + 100
= 136
Answer(s): 136