The number of blue and green stickers are equal.
If Adam gives away 80 blue stickers and 40 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 + 80 |
5 u + 40 |
Change |
- 80 |
- 40 |
After |
3 u |
5 u |
The number of blue and green stickers is the same at first.
3 u + 80 = 5 u + 40
5 u - 3 u = 80 - 40
2 u = 40
1 u = 40 ÷ 2 = 20
Number of stickers that Adam has at first
= 3 u + 80 + 5 u + 40
= 3 u + 5 u + 80 + 40
= 8 u + 120
= 8 x 20 + 120
= 160 + 120
= 280
Answer(s): 280