The number of blue and green stickers are equal.
If Adam gives away 70 blue stickers and 10 green stickers,
the ratio of blue stickers to green stickers becomes 4 : 7.
How many stickers are there at first?
|
Blue |
Green |
Before |
4 u + 70 |
7 u + 10 |
Change |
- 70 |
- 10 |
After |
4 u |
7 u |
The number of blue and green stickers is the same at first.
4 u + 70 = 7 u + 10
7 u - 4 u = 70 - 10
3 u = 60
1 u = 60 ÷ 3 = 20
Number of stickers that Adam has at first
= 4 u + 70 + 7 u + 10
= 4 u + 7 u + 70 + 10
= 11 u + 80
= 11 x 20 + 80
= 220 + 80
= 300
Answer(s): 300