The number of green and blue stickers are equal.
If Adam gives away 90 green stickers and 60 blue stickers,
the ratio of green stickers to blue stickers becomes 3 : 5.
How many stickers are there at first?
|
Green |
Blue |
Before |
3 u + 90 |
5 u + 60 |
Change |
- 90 |
- 60 |
After |
3 u |
5 u |
The number of green and blue stickers is the same at first.
3 u + 90 = 5 u + 60
5 u - 3 u = 90 - 60
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 3 u + 90 + 5 u + 60
= 3 u + 5 u + 90 + 60
= 8 u + 150
= 8 x 15 + 150
= 120 + 150
= 270
Answer(s): 270