The number of green and red stickers are equal.
If Adam gives away 70 green stickers and 50 red stickers,
the ratio of green stickers to red stickers becomes 3 : 5.
How many stickers are there at first?
|
Green |
Red |
Before |
3 u + 70 |
5 u + 50 |
Change |
- 70 |
- 50 |
After |
3 u |
5 u |
The number of green and red stickers is the same at first.
3 u + 70 = 5 u + 50
5 u - 3 u = 70 - 50
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has at first
= 3 u + 70 + 5 u + 50
= 3 u + 5 u + 70 + 50
= 8 u + 120
= 8 x 10 + 120
= 80 + 120
= 200
Answer(s): 200