The number of blue and green stickers are equal.
If Adam gives away 80 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 + 80 |
7 u + 20 |
Change |
- 80 |
- 20 |
After |
5 u |
7 u |
The number of blue and green stickers is the same at first.
5 u + 80 = 7 u + 20
7 u - 5 u = 80 - 20
2 u = 60
1 u = 60 ÷ 2 = 30
Number of stickers that Adam has at first
= 5 u + 80 + 7 u + 20
= 5 u + 7 u + 80 + 20
= 12 u + 100
= 12 x 30 + 100
= 360 + 100
= 460
Answer(s): 460