The number of green and red stickers are equal.
If Adam gives away 80 green stickers and 20 red stickers,
the ratio of green stickers to red stickers becomes 2 : 5.
How many stickers are there at first?
|
Green |
Red |
Before |
2 u + 80 |
5 u + 20 |
Change |
- 80 |
- 20 |
After |
2 u |
5 u |
The number of green and red stickers is the same at first.
2 u + 80 = 5 u + 20
5 u - 2 u = 80 - 20
3 u = 60
1 u = 60 ÷ 3 = 20
Number of stickers that Adam has at first
= 2 u + 80 + 5 u + 20
= 2 u + 5 u + 80 + 20
= 7 u + 100
= 7 x 20 + 100
= 140 + 100
= 240
Answer(s): 240