The number of blue and green stickers are equal.
If Adam gives away 30 blue stickers and 20 green stickers,
the ratio of blue stickers to green stickers becomes 1 : 3.
How many stickers are there at first?
|
Blue |
Green |
Before |
1 u + 30 |
3 u + 20 |
Change |
- 30 |
- 20 |
After |
1 u |
3 u |
The number of blue and green stickers is the same at first.
1 u + 30 = 3 u + 20
3 u - 1 u = 30 - 20
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has at first
= 1 u + 30 + 3 u + 20
= 1 u + 3 u + 30 + 20
= 4 u + 50
= 4 x 5 + 50
= 20 + 50
= 70
Answer(s): 70