The number of green and red stickers are equal.
If Adam gives away 60 green stickers and 40 red stickers,
the ratio of green stickers to red stickers becomes 3 : 8.
How many stickers are there at first?
|
Green |
Red |
Before |
3 u + 60 |
8 u + 40 |
Change |
- 60 |
- 40 |
After |
3 u |
8 u |
The number of green and red stickers is the same at first.
3 u + 60 = 8 u + 40
8 u - 3 u = 60 - 40
5 u = 20
1 u = 20 ÷ 5 = 4
Number of stickers that Adam has at first
= 3 u + 60 + 8 u + 40
= 3 u + 8 u + 60 + 40
= 11 u + 100
= 11 x 4 + 100
= 44 + 100
= 144
Answer(s): 144