The number of red and green stickers are equal.
If Adam gives away 40 red stickers and 20 green stickers,
the ratio of red stickers to green stickers becomes 5 : 9.
How many stickers are there at first?
|
Red |
Green |
Before |
5 u + 40 |
9 u + 20 |
Change |
- 40 |
- 20 |
After |
5 u |
9 u |
The number of red and green stickers is the same at first.
5 u + 40 = 9 u + 20
9 u - 5 u = 40 - 20
4 u = 20
1 u = 20 ÷ 4 = 5
Number of stickers that Adam has at first
= 5 u + 40 + 9 u + 20
= 5 u + 9 u + 40 + 20
= 14 u + 60
= 14 x 5 + 60
= 70 + 60
= 130
Answer(s): 130