The number of blue and green stickers are equal.
If Adam gives away 90 blue stickers and 60 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 + 90 |
3 u + 60 |
Change |
- 90 |
- 60 |
After |
1 u |
3 u |
The number of blue and green stickers is the same at first.
1 u + 90 = 3 u + 60
3 u - 1 u = 90 - 60
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 1 u + 90 + 3 u + 60
= 1 u + 3 u + 90 + 60
= 4 u + 150
= 4 x 15 + 150
= 60 + 150
= 210
Answer(s): 210