The number of red and green stickers are equal.
If Adam gives away 50 red stickers and 20 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 + 50 |
5 u + 20 |
Change |
- 50 |
- 20 |
After |
3 u |
5 u |
The number of red and green stickers is the same at first.
3 u + 50 = 5 u + 20
5 u - 3 u = 50 - 20
2 u = 30
1 u = 30 ÷ 2 = 15
Number of stickers that Adam has at first
= 3 u + 50 + 5 u + 20
= 3 u + 5 u + 50 + 20
= 8 u + 70
= 8 x 15 + 70
= 120 + 70
= 190
Answer(s): 190