The number of blue and green stickers are equal.
If Adam gives away 40 blue stickers and 20 green stickers,
the ratio of blue stickers to green stickers becomes 3 : 5.
How many stickers are there at first?
|
Blue |
Green |
Before |
3 u + 40 |
5 u + 20 |
Change |
- 40 |
- 20 |
After |
3 u |
5 u |
The number of blue and green stickers is the same at first.
3 u + 40 = 5 u + 20
5 u - 3 u = 40 - 20
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has at first
= 3 u + 40 + 5 u + 20
= 3 u + 5 u + 40 + 20
= 8 u + 60
= 8 x 10 + 60
= 80 + 60
= 140
Answer(s): 140