The number of green and red stickers are equal.
If Adam gives away 60 green stickers and 30 red stickers,
the ratio of green stickers to red stickers becomes 3 : 5.
How many stickers are there at first?
|
Green |
Red |
Before |
3 u + 60 |
5 u + 30 |
Change |
- 60 |
- 30 |
After |
3 u |
5 u |
The number of green and red stickers is the same at first.
3 u + 60 = 5 u + 30
5 u - 3 u = 60 - 30
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 3 u + 60 + 5 u + 30
= 3 u + 5 u + 60 + 30
= 8 u + 90
= 8 x 15 + 90
= 120 + 90
= 210
Answer(s): 210