The number of red and green stickers are equal.
If Adam gives away 70 red stickers and 10 green stickers,
the ratio of red stickers to green stickers becomes 1 : 4.
How many stickers are there at first?
|
Red |
Green |
Before |
1 u + 70 |
4 u + 10 |
Change |
- 70 |
- 10 |
After |
1 u |
4 u |
The number of red and green stickers is the same at first.
1 u + 70 = 4 u + 10
4 u - 1 u = 70 - 10
3 u = 60
1 u = 60 ÷ 3 = 20
Number of stickers that Adam has at first
= 1 u + 70 + 4 u + 10
= 1 u + 4 u + 70 + 10
= 5 u + 80
= 5 x 20 + 80
= 100 + 80
= 180
Answer(s): 180