The number of blue and green stickers are equal.
If Adam gives away 30 blue stickers and 20 green stickers,
the ratio of blue stickers to green stickers becomes 5 : 7.
How many stickers are there at first?
|
Blue |
Green |
Before |
5 u + 30 |
7 u + 20 |
Change |
- 30 |
- 20 |
After |
5 u |
7 u |
The number of blue and green stickers is the same at first.
5 u + 30 = 7 u + 20
7 u - 5 u = 30 - 20
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has at first
= 5 u + 30 + 7 u + 20
= 5 u + 7 u + 30 + 20
= 12 u + 50
= 12 x 5 + 50
= 60 + 50
= 110
Answer(s): 110