The number of red and green stickers are equal.
If Adam gives away 40 red stickers and 10 green stickers,
the ratio of red stickers to green stickers becomes 3 : 5.
How many stickers are there at first?
|
Red |
Green |
Before |
3 u + 40 |
5 u + 10 |
Change |
- 40 |
- 10 |
After |
3 u |
5 u |
The number of red and green stickers is the same at first.
3 u + 40 = 5 u + 10
5 u - 3 u = 40 - 10
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 3 u + 40 + 5 u + 10
= 3 u + 5 u + 40 + 10
= 8 u + 50
= 8 x 15 + 50
= 120 + 50
= 170
Answer(s): 170